Mac Won’t Boot? A Step-By-Step Guide to Waking It Up
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Last month my dad brought home a 2011 MacBook Pro that his work didn’t want because the battery wouldn’t charge. Plugged in, it worked for about a week, then it simply stopped booting. He said, if we could get it to work, we would keep it.

The following article documents my tale from the trenches in trying to bring a Mac to life.

Though I ultimately failed to bring it to working condition for reasons I will get into later, I hope this story and instructions can be of use to someone else out there trying to revive a Mac.


First things first: Check that the computer has power. Is the battery plugged in properly, or is it plugged into the wall properly, with all parts of the cable secure? It might sound obvious, but before you can move on to any of the other strategies on this list, you have to know the state of your Mac’s power.


If you’re lucky, you just found out that your Mac wasn’t powered, and fixed the connection. It turns on, and you get to stop reading this article and do something more fun.

Not so lucky? Keep reading.

Power Cycle

I have to give credit to Victor Clausson from iFixit Answers for sharing this technique I have seen nowhere else, which managed to awaken my Mac when it showed no signs of life. At the time, my MacBook was not responding to the power button at all, and not charging, despite being plugged in and showing a glowing green light on the MagSafe power cable indicator.

This special power cycle Why Does Rebooting Your Computer Fix So Many Issues? Why Does Rebooting Your Computer Fix So Many Issues? "Have you tried rebooting?" It's technical advice that gets thrown around a lot, but there's a reason: it works. Not just for PCs, but a wide range of devices. We explain why. Read More takes about 20 seconds:

  1. Unplug the battery.
  2. Unplug the MagSafe power cable.
  3. Hold down the power button for about 10 seconds and continue to do that.
  4. While still holding the power button down, insert the MagSafe power cable and hold it for another 10 sec.
  5. Release the power button after those 10 sec and make a “normal” press as if you would normally turn on your computer.

When I tried that, the Mac woke up, showed the loading screen, and played the start-up chime. It gave me brief hope that everything would be okay, but my MacBook quit before it finished booting, suggesting other problems. If you’re facing a similar situation where your Mac starts to turn on but runs into problems during boot-up, read on.

Reset Your SMC & PRAM

My next course of action, now that I could get the Mac to wake up, was to reset the SMC and PRAM How To Reset Your Mac's SMC & PRAM – And Why How To Reset Your Mac's SMC & PRAM – And Why Sometimes your Mac will act strange for no apparent reason, and if a restart doesn't work, sometimes you'll need to reset the SMC and PRAM. Read More .


Your Mac’s SMC (System Management Controller) controls its lights, fans, displays, power, and more. That’s why when my Macbook Pro didn’t boot, the first thing I did after a power cycle was reset the SMC.

If you own a recent MacBook without a removable battery (like the MacBook Air or Retina MacBook Pro) the steps to reset your SMC are as follows:

  1. Shut down your MacBook.
  2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
  3. On the built-in keyboard, press the (left side) shift+control+option keys and the power button at the same time.
  4. Release all the keys and the power button at the same time.
  5. Press the power button as normal to turn on the computer.

On a portable Mac with a removable battery (like the older MacBook Pro), the instructions are as follows:

  1. Disconnect the MagSafe power adapter from the computer, if it’s connected.
  2. Remove the battery.
  3. Press and hold the power button for 5 seconds.
  4. Release the power button.
  5. Reconnect the battery and MagSafe power adapter.
  6. Press the power button to turn on the computer.

For instructions for older MacBooks without removable batteries (All editions of MacBook Air, and 2009 MacBooks and MacBook Pros), and the Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve, refer to Apple Support’s System Management Controller reset instructions.


I reset the PRAM (parameter random-access memory) too while I was at it, though I don’t think it directly affects power.

Mac Won't Boot? A Step-By-Step Guide to Waking It Up 4630801442 afe152a5fb z

To reset the PRAM, turn on your Mac and immediately after you hear the start-up chime, hold down the command+option+p+r keys, and continue holding until the computer restarts a second time. More modern MacBooks store the information that PRAM used to in NVRAM (non-volatile random-access memory), which is reset in the same way.

We covered the different ways to reset your SMC and PRAM How To Reset Your Mac's SMC & PRAM – And Why How To Reset Your Mac's SMC & PRAM – And Why Sometimes your Mac will act strange for no apparent reason, and if a restart doesn't work, sometimes you'll need to reset the SMC and PRAM. Read More depending on what kind of Mac you are using. They’re all quick, taking less than a minute.

Run Apple Diagnostics/Hardware Test

One neat thing about owning a Mac (I’m usually a Windows user) is that Apple provides its own Hardware Test (called Apple Diagnostics from mid-2013 onwards). It runs in its own bare-bones operating system, without the need to have the main operating system working.


The test is usually already on the Mac, but if you updated your operating system or had to re-install your operating system for any reason, they might not be loaded yet. Here’s where it gets more impressive: your Mac can actually connect to the Internet while the main operating system isn’t working, and automatically, magically, download the Apple Diagnostics/Hardware Test. I was floored.

To access the Apple Diagnostics/Hardware Test:

  1. Press the Power button to start up your Mac.
  2. Hold option+d keys immediately after the Apple startup chime until you see a “Starting Internet Recovery” message. You may be asked to select your WiFi network.
  3. Give your Mac some time to download the tests.
  4. Finalise installation when the tool asks you to select your language.

Once the Apple Diagnostics/Hardware is set up, go to the Hardware Tests tab and click on the big Test button. Extended testing checks RAM (Random Access Memory), one of the essential elements of every computer What's Inside Your Computer: The Story Of Every Component You Need To Know What's Inside Your Computer: The Story Of Every Component You Need To Know Whether you're buying a new computer or building your own, you're going to be subjected to a lot of acronyms and random numbers. Read More , among other things. It took me 45 minutes, but it can take longer depending on how much RAM you have installed. That’s why I recommend you run the standard test first, to save yourself some time.

Run Memtest

Unfortunately, Apple’s Hardware Tests are often considered inadequate for diagnosing RAM problems completely. MacRumors’ guide to Testing RAM recommends Memtest, a popular memory testing tool typically run from Terminal. There are free and paid options, and even a graphical user interface (GUI) version.

Run Memtest in Safe Mode, a version of your operating system that does some checks and prevents unnecessary software from running.

Starting Your Mac in Safe Mode

  1. Press the Power button to start up your Mac.
  2. Hold the shift key immediately after you hear the start-up chime.
  3. Release the Shift key when you see the Apple logo appear on the screen.

If you discover a problem with your Mac’s RAM and you are able to open it, you might be able to switch the faulty memory or simply remove it (in case not all of your RAM is bad).


Recovery Partition

OS X provides a suite of tools to recover your Mac’s operating system called OS X Recovery. You can access Recovery Mode by holding down command+r immediately after you hear the start-up chime. After the Apple logo appears, you can release the keys and you will see a screen giving you options to:

We suggest you first use Disk Utility to verify that your start-up disk doesn’t have problems (although repair will check for problems and fix any it finds, so that may be more efficient). If that doesn’t help, try restoring from a recent Time Machine backup. As a last-resort, try a full re-install.

For those of you reading this article pre-emptively (lucky you!), consider this your one reminder to backup your data The Ultimate Triple Backup Solution For Your Mac [Mac OSX] The Ultimate Triple Backup Solution For Your Mac [Mac OSX] As the developer here at MakeUseOf and as someone who earns their entire income from working online, it's fair to say my computer and data are quite important. They’re set up perfectly for productivity with... Read More . Do it – it’s easy and worth it (trust me, speaking from experience). Don’t procrastinate backing up until you have a problem.

Run Linux

If you need something to work on your Mac in between getting a repair or replacement, you could also try running Linux off of a USB How to Create and Boot From a Linux USB Drive on Mac How to Create and Boot From a Linux USB Drive on Mac There are a few ways to get a create a live Linux USB drive that will boot on your Mac: you can do it with freeware, or get your hands dirty with the command line. Read More or CD. That may keep you going for a while, though I have a feeling you’ll want to get back to your regular operating system as soon as possible.

Mac Won't Boot? A Step-By-Step Guide to Waking It Up 7715955342 5ae97568da z

What You Should Know About Boot Errors

Unusual visual and auditory behaviour may be error code indicators. A common audio error code, for example, is three beeps in a row followed by a pause, repeating. That indicates that your RAM did not pass a data integrity check.

In the event that none of your efforts to revive your Mac come to fruition, pay attention to the symptoms and consider contacting an Apple Support person.

As for me, my quest to bring a Mac back to life ended when it became clear that it had a broken battery, bad RAM, and a bad hard drive. We felt it would be too expensive to replace all the parts for a Mac that was destined for disposal in the first place.

Did Your Mac Live or Die?

It would give me solace if you would comment below if you found my guidance helpful, dear Mac user – or, tell us your story of the death of your Mac. Did your indicator lights fail? Did you hear strange noises like 3 repeating beeps instead of the familiar start-up chime? Could you fix it yourself or was an “Apple Genius” able to help?

If you try anything else in your efforts to wake up your Mac, please let us know. Maybe you’ll save someone else the pain of having to replace their shiny laptop too soon.

If nothing works quite right, your Mac is getting on in years, and you don’t want to purchase replacement parts, you can always take it as a chance to learn how to recycle your old laptop Disposing Of An Old Laptop - What To Recycle, What To Keep Disposing Of An Old Laptop - What To Recycle, What To Keep Laptops are a treasure trove of parts that can live more than one life. Whether they continue a life as spare part or become the subject of a DIY tech project, you can get a... Read More .

Image credit: Apple with missing part Via Shutterstock, command (Micah Elizabeth Scott), Apple USB (Mike Lau)

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  1. Eddy
    July 15, 2018 at 7:57 pm

    I am using a MacBook Air 2015 model. A month back it started giving me the problem of booting up. I saw your link and it helped me. Now again i am having problem of boot. Tried all the functions. MacBook stared but hangs, then again boot problem. Did all the things. But still same problem. Sometimes it turns on then hangs after 2 minutes and sometimes, screen shows flickering. I think its the time to take it to Apple Service Centre.

  2. Kingsley
    July 2, 2018 at 1:51 pm

    My macbook pro mid 2010 was okay the night before until I tried to switch it on the next morning. I discovered it wouldn't turn on even after many trials to get it to start. I left it for some time and came back to it but still had the same issue. So many thought ran through my mind as I couldn't afford this moment to change laptop, but a quick Google search brought me to your site and lo and behold the Shift+Control+Option and Power button simutaneous push restored it. Its working fine now and I appreciate that your site could help. Thank you so much.

  3. Bryan Pearson
    June 11, 2018 at 2:45 pm

    This article was exactly what I was looking for. The power cycle did the charm for me.

  4. LisaLisa
    May 11, 2018 at 3:40 am

    YOu totally saved my Macbook Air from a lobotomy. Thank you. I did this:

    "Verify and repair connected drives using Disk Utility."

  5. Sarah
    April 27, 2018 at 11:49 pm

    Nope, just the logo and bbar that almost gets to the end. 2011 pro.

  6. Doug Spittler
    April 27, 2018 at 10:16 pm

    Mid-2010 MacBook suffered what seemed to be a too fast battery discharge on normal usage. Changed battery, new one appeared to have low capacity value. Changed for another new battery, seemed to have greater capacity (according to System Parameters software) and much greater discharge time. Went through Battery Calibration process. All seemed well. Installed remaining battery screws and back cover. Tried to start up; nothing. No light, no fans, nothing. Removed screws until the last known working conditions were duplicated; no change. Went through all processes suggested in above article, still nothing. Battery voltage at first 9-pin motherboard connector is 12.4 VDC. Anyone have any suggestions?

  7. Ken
    February 26, 2018 at 10:23 pm

    It did not resuscitate. Now I am looking for a backup/Time Machine copy inhales that will work. Thanks for the tips. By accessing recovery mode, I can at least tell that the battery is at 96%. Memory is fine. The SSD is fine. But my Macintosh HD partition (the whole drive) cannot be repaired, evidently. I am not sure what the problem could be.

  8. Chris
    February 8, 2018 at 6:16 pm

    My mid 2012 MacBook pro will start and boot up but only after about 5-10 minutes of holding and releasing the power button. It works fine after it finally starts. It gets power just fine and I can see the power light come on everytime I hold and release the power button. I have no idea what to do. Please help!

  9. David
    January 18, 2018 at 3:56 pm

    My MacBook Pro was brought to life again. After it tried rebooting after an update, it wouldn't turn on again. Just a very short "bssshhhhrrrttttffffrrrpppp" (the sound it makes at boot up, like it's about to throw up) and the front indicator went out again.

    Used the CMD+Option+p+r trick and we're alive again.


  10. Desley
    January 14, 2018 at 5:42 am

    My Mac Pro worked until I updated the os to high Sierra. Don’t believe that is the problem. The Mac kept displaying something to do wth ICloud. (I can’t remember what about in particular) . I didn’t want to attend to that at the time so kept trying to get out of the iCloud screen. It was difficult but I managed to remove it but now my Mac won’t open. When it is switched on the screen awakens, the Apple logo appears, the progress bar starts, very very very slowly proceeds but that is as far as we get. No further. HELP!

    • Matthew Neuenswander
      January 15, 2018 at 2:06 pm

      Hello friend, running into a similar issue where it won’t reboot. You might consider reinstalling the operating system. Hold the I/O button down to turn off, wait 30 seconds, push and hold the alt button while turning back on. That should provide a boot up menu either from your computer HD or another HD that you use as a backup. Options should include restoring a prior backup or reinstalling the operating system. Some of these options may delete personal files so use at your own risk.

  11. Mike
    December 14, 2017 at 9:30 pm


  12. Tang
    December 8, 2017 at 3:56 pm

    Thank you so much for your website! Awesome stuff! Your instructions were really instructive and clear. Just by following your steps, I managed to get my crashed macbook back to health very fast (well, 3 hours, but that is faster than sending it to the Apple workshop). Thank you so much!

  13. Cinda Brown
    November 26, 2017 at 5:57 am

    I turn off myMacBook Pro and when I turn back on, I get the apple with black line inching its way to the end. Gets to the end and does nothing. I ran the hardware diagnostics and it said No Problem found.

    Now what?

    • Desley
      January 14, 2018 at 5:43 am

      This is same problem as mine

  14. Antony
    November 22, 2017 at 1:09 am

    Reset the SMC and the PRAM as you suggested above on my daughters 'dead for a year' 2011 macbook pro and it is currently running and happily backing up its files. We shall see how stable it is before jumping for joy! Thankyou

  15. Heidi Johnson
    October 29, 2017 at 6:25 pm

    Using a MacBook 2015-I know only 2 yrs old! Last week it shut off while I was using it. Thought a power glitch, restarted but it was stuck in a loop. Moments after showing the Apple ID screen, it shut off, sounded the chime and over and over it went. Tried all the suggestions you recommended. Files all said ok, only problem it said was an issue with the camera. Yea it booted up and I saved data to a jump drive. Worked fine for several days then it shut off again. Now none of the above have an effect - just chime and loop. Apple Genius say 2 options-pay a third party $500 to repair or have them try to wipe it for free. Took it to India this summer had a few power glitches there, destroyed a kindle fire and curling iron, scared something happened to my Mac. It has had a few problems since I got back, had to reinstall Office. Any help, please.?

  16. Stephen David Munley
    October 27, 2017 at 1:13 am

    Thank you so much for this article. I have never heard of you or this website, but a quick Google search on my phone led me here. I had physically shut my laptop while installing the new update. This saved me valuable hours and a trip to the apple store. I am typing this review on my laptop now because of you. Again, thank you a bunch.

  17. Joe
    July 8, 2017 at 1:45 am

    Great article. My computer is partitioned into two drives (Macintosh HD and BOOTCAMP). Thanks to this article I was able to open recovery partition. My main drive (macintosh) was grey and I could not run first aid on it. It also wasn't listed as a location to reinstall OS. So I ended up installing MAC OS on the BOOTCAMP drive and was able to migrate files from the Macintosh drive. I am backing up right now just in case this happens again! Macbook pro 15" retina, purchased in fall of 2013 for anyone interested.

  18. Kelly
    June 12, 2017 at 3:22 am

    Thank you so much. This was really helpful & I got my mac up and running again!!!

  19. Chris Brangwin
    April 23, 2017 at 7:34 am

    Hi thank you for an excellent article. Nice to see a Vancouver ite so active. I live in Australia but I went to UBC.
    My problem is with a Mac desk top but the suggestions you make apply to the top as well.
    I found the s that came with the computer . I put in the Hardware disk and sure enough, miraculously, after pressing ''D key up came the Hardware Test screen.I pushed the Test box button and left the computer to do its test. After 4 hours the progress bar was within a centimeter of the end. But there it stayed even afetr leaving it overnight.
    What to do now?
    Any ideas would be most appreciated.

  20. Bob
    March 22, 2017 at 8:41 pm

    Retired Apple Certified Tech.
    A friend's 15" MBP (non-removeable battery)would only flash led for a second and run fans for a second. Numerous SMC resets were fruitless but Power Cycle brought it back to life. Thanks much. You made me look smrt.

  21. Bob
    March 15, 2017 at 5:09 pm

    Hi, thank you for posting this. Older MBP. I was getting anxious as I tried everything until I got towards the bottom of the list. The recovery partition worked! I used a recent time machine backup. I fixed myself although only with the guidance of your article. Thank you for sharing this.

  22. John
    March 14, 2017 at 7:30 pm

    Not sure which one worked but my mac is back- thanks for a great article - best I read on the web

  23. maddy
    March 8, 2017 at 3:49 am

    I thought I tried everything to get mine to turn on and found this article and did the holding down the power button 10 seconds twice and then the third time plugged the power cord in and pressed the power button and it finally booted up! Thank you for the trick!!

  24. Lavish
    February 25, 2017 at 10:13 am

    My MacBook Air booted after following a few steps! Thank you!

  25. Judy
    February 24, 2017 at 9:00 pm

    I thought my MacBook Pro was going to be a doorstop!
    but I used the :
    Unplug the battery.
    Unplug the MagSafe power cable.
    Hold down the power button for about 10 seconds and continue to do that.
    While still holding the power button down, insert the MagSafe power cable and hold it for another 10 sec.
    Release the power button after those 10 sec and make a “normal” press as if you would normally turn on your computer.

    And it started right up. I thought that was a crazy thing to do and how did anyone ever discover that it worked??? But it sur did the job on this laptop... thanks again....

  26. Yolandi
    February 14, 2017 at 2:27 pm

    My MacBook Pro 2011 went black/ switched off because it over heated on my desk, thanks to the African sun, shining on it. I managed to switched it on, where my user login logo appeared, but then a loading bar would appear and just freeze.

    Then I found your link, which made my day! THANK YoU for sharing & for giving simple to follow instructions! Happy Mac again

  27. Elesha
    February 12, 2017 at 3:59 am

    Thank you!! Resetting the SMC & PRAM got my computer to finish booting up AND it's running better than it has in months

  28. Mike Sysum
    December 20, 2016 at 2:02 pm

    Power cycle worked for me. Ace!

  29. Rhesa
    December 20, 2016 at 2:59 am

    Its true

  30. Molly
    December 9, 2016 at 5:52 am

    This helped me so much!!! You are a genius thank you!! I owe you my life.

  31. Jim Gevlin
    October 25, 2016 at 4:50 pm

    Thank you for posting this:
    - My problem started this am with a very slow 2010 IMAC that has 16 RAM , and a time machine attached;
    - Several warm and cold reboots brought the system totally to its knees, and then it stopped rebooting half-way through the process;
    - option D during reboot brought me to an error screen (3403D, maybe?) - no progress there;
    - your command-R instruction did bring me to the restore menu: I chose a time machine backup, which is now underway...we will see.

  32. Patricia Eustaquio
    October 21, 2016 at 3:15 pm

    Hi, my MacBook Pro 9.2 doesn't want to start up.

    I updated it to macOS Sierra yesterday night and left it be, when I opened it the next day it wouldn't continue starting up. Please help. I can send you the picture of what it's showing me now. Been trying several tips but nothing is working.

  33. Aggravated in NY
    October 19, 2016 at 1:01 am

    So this article was written assuming that resetting the SMC or PRAM was a success and we were able to start the computer. (Remember the reason you wrote this article, and why I wasted my time reading it, was because my computer wasn't starting up. At all! So, what can I do if resetting the SMC or PRAM was not successful and my computer still didn't start up for me to follow your next steps?

  34. simar
    August 5, 2016 at 6:02 am

    i just bought mac book pro few days ago, and today it failed to boot. finally after pressing shift+control+option keys twice it finally woke up, almost gave me a heart attack.

  35. David
    July 31, 2016 at 8:57 am

    I have a Mac Pro (2013) running OSX 10.11.6 I recently swapped the drive for a 1GB and have had problems ever since. I reinstalled the OS as a clean install over the top of an install from Time machine. Problem is it won't wake properly from sleep. Nor will it boot properly unless I reset PRAM every time after disconnecting the display connected to HDMI. Sometimes I get the log in screen - where password is required - and having input the password the same screen the appears again, When I input password for the second time it then lets me in and generally gives me the pages left open when put into sleep mode. It's so frustrating and bizzare behaviour. Disk utility tells me there is nothing wrong ..... Any thoughts welcome

  36. Sam
    July 30, 2016 at 8:19 pm

    I did the power cycle tip too and it worked. Mine is a vintage one already. 2008 MacBook Pro 15". I used to leave it on Sleep mode most of the time while connected on the charger. I'm not sure if that was the reason why the second I open it, it won't boot successfully. I'm worried about the files I just transferred from my phone but thankfully it opened so I'll go ahead and retrieve them back for safety. Thanks again!

  37. David
    July 29, 2016 at 12:53 pm

    Thank you for the power cycle tip! Brilliant?

  38. Blayne
    July 18, 2016 at 6:04 am

    I followed the power cycle reboot steps and got my mac to give me signs of life and then when it died in the middle of boot I restarted the process and plugged the battery in the middle because I only have a 60w power supply and needed an 85w. I used the battery as a wattage boost in the middle and got my computer back up and running.

  39. Fooky
    July 12, 2016 at 12:06 am

    what if he dont respond on comand buttons ? he just show white after logo, or blue

  40. arryk
    June 24, 2016 at 4:36 pm

    Thanks for the guidance. My Mac Pro late 2011, non removable battery behaves strangely. It does not switch on at all. Battery shows fully charged when I check by small side switch. After connecting adapter, no green/orange light in connector. On pressing main on/off button nothing happens. On pressing shift+control+option, adaptor connector shows green light. Now, If I remove adapter connector, Mac starts up. But no chime. Before it completes booting it shuts down. Restarts on its own after sometime. this happens a couple of times, then works normally till you shut down. On restarting same thing is repeated. on restarting if I try running Hardware diagnostic test command+D does not have any effect and Mac starts as normal. Any suggestions please...

  41. HRFennelly
    June 16, 2016 at 9:57 pm

    Black screen, L-type chord shows a charge going on (orange light), fan whirring. No other signs of life. No start up chime, no matter how many times I hard power down and restart. It's a 2009 MacBook pro with a non removable battery.

    • Sinjin
      October 3, 2016 at 3:52 am

      I'm having the same problem, but with a retina MacBook Pro. Someone help please

    • Alex
      March 10, 2017 at 8:52 am

      Hi Fennelly. I have the same issues right now. Did you manage to bring back your computer back too life?

  42. Jordan
    June 14, 2016 at 11:19 pm

    Holy Bologna!!! I was convinced my MacBook Pro was toast. The special Poeer cycle seemed...odd; if not a tad dangerous to be 100% honest. I was ASTONISHED to see the screen boot up again. THANK YOU sooo much!!

  43. Cobus
    June 2, 2016 at 4:24 pm

    Hi. Compliments on the well structured and informative guide!
    Started using a Macbook Pro Md101 for a week or so now, when it just turned off.
    At the istore they performed a SMC and run a diagnostic check - proclaiming all is fine.
    A day after it happened again.
    The SMC as I understand from above isn't working when I try it either.
    Any help/ideas please?
    Thank you kindly

  44. Robert
    May 29, 2016 at 6:24 am

    Fantastic guide, I reset the PRAM and I was then able to format the HD and re-install the OS. Great guide, I have no Mac experience and was able to repair my son's Mac using your guide.

  45. Mo
    May 28, 2016 at 8:21 pm

    in all cases i get the folder with questionmark could anyone help ?

  46. Guillaume
    May 25, 2016 at 7:05 pm

    nothing in this step-by-step tutorial worked.... it always comes down to a grey folder with a ? flashing, no window pops up when trying the command+r or all the other commands.... im hopeless...

  47. Robyn
    May 25, 2016 at 10:30 am

    After hours of trying everybody else's suggestions I fixed me problems with your pointers!!! It took many layers of fixes but eventually sorted out my MacBook. I luv u ?????? Thanks

  48. Joe
    May 7, 2016 at 3:01 pm

    You are awesome! I reset the PRAM and it booted up quickly. Worked like a charm. You are the best. Thank you.

  49. Luke
    April 20, 2016 at 7:42 am

    The first solution worked for me!! The fan seems to be a lot louder.. But my MacBook is up and running. Thanx!!

  50. Anonymous
    March 25, 2016 at 8:39 am

    Thanks so much, Jessica and to Victor Clausson for the "special power cycle" tip. It worked and I was able to then reset my SMC & PRAM using your clear step by step instructions.

  51. Mark Alan Effinger
    March 21, 2016 at 1:39 am

    a-HA! Thanks Jessica!
    I have had a really unreliable MacBook Pro on my hands since installing El Capitan.
    But even after all the El Cap troubleshooting, I've still been stuck!

    Then, a little comment from you (and I was digging into RAM at the same time, but getting no love): It's the memory sticks. 16gb of Crucial.

    The three beeps and a pause was the clue.

    Thank you, thank you, thank you!
    Mark Alan E

  52. RSB56
    March 16, 2016 at 7:30 pm

    I thought you were nuts. Unplug the power and hold down the button? Reattach the power and keep holding the button down? What was that possibly going to accomplish? But . . . IT WORKED! Thanks!

  53. Anonymous
    February 25, 2016 at 6:52 pm

    Oopsi Of course I didn't back up my files!! Hope it goes well and nothing is lost

  54. Anonymous
    February 25, 2016 at 6:50 pm

    Thanks for awesome detailed re-program BUT I tried all of above…Battery not removable>>Power button won't "Turn On" + MagSafe Charger not charging????????
    Have appt @ Apple Store in 1hr!!
    Been having battery problems within my Apple Care but store refused to do anything; kept doing diagnostic, all extras……???????? Of c course, "All Hells Break-Loose after Warranty is up"

  55. Kenn Hong
    February 19, 2016 at 7:59 am

    My command+R not work... Now come?

  56. Chris
    February 6, 2016 at 3:12 am

    Well, I accidentally deleted my HFS+ partition when playing around with GPARTED... and now the Macbook doesn't see the Mac OSX Install on boot up. I didn't remove my partition with the OSX install - I just can't access it! I don't know what to do.

  57. Mujey
    February 1, 2016 at 6:31 am

    i had a problem with my macbook pro A1286 keyboard. so i installed a new one. it started out fine but the back light was not there. after 15 minutes mac gave very loud beep and crashing screen. later it wont turn on. I have replaced the old keyboard thinking it might be problem with the new one. but its still dead. the mag safe seems to work well and battery is working. when pressed the power button i can hear the hard drive spinning for seconds and gives a chime from the speaker near the hard drive. can anyone tell me what could be the problem. thank you

  58. Piotrek
    January 28, 2016 at 10:12 pm

    My macbook pro is still dead. I have tried everything. :'(

  59. Al
    January 19, 2016 at 7:30 pm

    Power Cycle - This worked for me when my Macbook Pro (2013) turned on beeped but stopped loading with < than 1/2 of the bar showing loading completion.

    • A
      August 15, 2017 at 1:56 am

      Sounds like mine and none of these steps even showed anything registering at all.

  60. Shiva
    December 29, 2015 at 12:29 pm

    Hi, I'm happy all other users solved their problems with Mac.. But, My problem seems a bit complected.. only NVRAM steps work normally.. But still get White Screen after chime Sound... Non of the startup combinations or shutdown work... Any suggestion would be great... Thank you..

  61. Patricia Johnston
    December 25, 2015 at 10:50 pm

    Three days ago, I plugged the Macbook (early 2012) into the socket to charge. The next day when I turned it on - nothing happened. No chime, no screen, nothing. Took it to Mac Genius which was a waste of time, took it to an Apple approved repair shop, they said the keyboard was clearly full of water (impossible), had a technician visit the house and test, doing all the magic tricks you can do to wake up a mac, nothing worked - everyone said it's the logic board. I have had this Macbook (purchased new) only 2.5 years, it was out of warranty and I wasn't about to spend 750 Euro to replacee the logic board! It didn't make sense that this essential and most expensive part of the MBP would die so soon. I had suspected the battery as responsible for some time for other issues (erratic track pad for example). So I watched a tutorial on how to remove the battery (the one you should NEVER remove according to everyone). Presto! easily done and when I plugged in the Macbook it came right back on and all the documents I had been working on 3 days before, showed up too. I backed up the computer, turned it off - no problem rebooting at all. And in fact the computer is working much faster now. I will have it totally checked out and replace the battery (38 euros). Hope this helps people with similar issues!

    • Dei
      January 1, 2016 at 1:09 pm

      Thanks for your sharing, I had have same issue with you. I followed your steps. And ahaa!! my MacBook can turn on again.

    • Anonymous
      February 25, 2016 at 7:01 pm

      That is so awesome!! Its always Battery Issues with Apple Products. I bought out iPhone 5 when it came out, spend $800 CDN and within 3 months battery problems. I gave up!! Recently bought iPod Touch battery life drains constantly + Wi-Fi doesn't work! Constantly going to Apple Store is annoying especially talking to Genius staff is useless. I have 2011 MacBook pro and My Sony laptop I bought in Hong Kong lasted me 10 yrs than battery gave out.

  62. Mitch
    November 21, 2015 at 4:54 am

    Thanks so much! I did every step through the PRAM reset, which is when my MacBook Air came back to life. I'm grateful for your help!

    • Jessica Coccimiglio
      November 21, 2015 at 9:47 am

      Wonderful news! So glad I could help.

  63. Ranjith Ravi
    November 14, 2015 at 9:41 am

    Thanks a lot!!! I was so worried but your guide relieved me cuz my Mac booted after the PRAM reset :) :) Thanks again

  64. Anonymous
    November 7, 2015 at 3:59 pm

    Suddenly Macbook Pro bought in 2013 would only turn on , and run for about 2 minutes, then shiut down. This happened in Safe Mode, fsck, Recovery mode, resting RAM, SMC, everything. But following your "run Apple Diagnostic/Hardware Test" the machine restarted and booted up perfectly as before! Just running that Test did something that all the other processes could not. I wish you very well and great success.

  65. Anonymous
    September 19, 2015 at 10:52 am

    Hey! I've got a 27" iMac from 2010. A little while ago it wouldn't boot anymore. I heard the "Wall-E" sound, it showed a grey background, the apple logo and a bar loading. At about 50% of the bar loading it stopped and just did nothing else. So I was stuck. A coworker suggested re-installing OSX from a USB stick. He provided me with a stick with the OS. I started the computer with the USB drive plugged in, and held down the option button. This shows the option to boot from the USB drive. When I selected that, I got back to a grey background with an apple logo and a bar loading. It got hanging again. I tried the memtest option; restarting with option+d. I did the extended test. It found nothing. Out of desperation I tried starting my computer once more with the USB. Now I did get into Disk Utility. I was able to clear the HD and install the new OS.

    Now I'm wondering if I could have just started the computer after the test, without re-installing the OS. Oh well, it's an old computer, I only use it for Netflix nowadays. Thanks for the tips, they were golden!

  66. Anonymous
    September 1, 2015 at 10:38 pm

    Had to log in and post that the 10 second with unplugged, then while holding do another 10 seconds, fixed my issue. My Mac hadn't been turned on in probably at least a year and this got it to boot! Thank you!

    • Mihir Patkar
      September 2, 2015 at 7:11 am

      Glad to know this still works, Charles! Which model/make are you using?

  67. Anonymous
    August 24, 2015 at 6:44 pm

    Holy crap! Power cycle worked! PTL!

    • Jessica
      September 2, 2015 at 4:44 pm

      So glad to hear it helped!

  68. Anonymous
    July 8, 2015 at 2:32 am

    No chime. I've tried a variety of fixes suggested here and in other places with no luck. Machine starts to boot and goes to a black screen with cursor showing after the progress bar is about halfway. I've tried various key combinations and can't get the chime so most key combinations don't work.

  69. Anonymous
    June 30, 2015 at 10:40 pm

    I get a "progress bar" that stops about 1/2 way across, so OS X utilities won't load. Help button says hard disk needs replacing?

    • Anonymous
      September 19, 2015 at 10:53 am

      I had the same problem, running extensive memory tests on my computer solved it for me, as you can see in my comment.

  70. Anonymous
    June 30, 2015 at 2:38 pm

    Thank you it helped me a lot and the trick with the power cycle worked for me.

  71. dbrick
    June 1, 2015 at 4:46 am

    update on my comment below. i was looking at this and someone suggested draining the battery, i had tried everything else so.... the further i read in the comments i was discouraged bc/ people said unplugging the battery had worked for them and saved them the time of draining the battery but i had unplugged my battery 20 times trying different solutions but i still let it drain and then i plugged in the computer and happiness. hope this helps someone if everything above doesn't work for them.

  72. dbrick
    May 31, 2015 at 8:42 pm

    macbook pro 17in. early 2011. computer froze, did a hard shutdown by holding down power key. tried to restart, fans turn on, indicator light on front lights up, check the charge on the side and it says it is fully charged but it doesn't boot, no chimes, keyboard, power button and apple on front don't light up and the screen stays black. have tried everything 10 times. everything here and then some. any other ideas?

    • dbrick
      June 1, 2015 at 4:48 am

      let the battery die and then plug in power. happiness.

  73. Rosanna Ciliberti
    May 31, 2015 at 10:53 am

    I switch off my macbook pro before going on holiday for a couple of days. Came back wanting to catch up with work and would not start at all, with battery indicator on charger a very dim green. Have searched the net for every possible solution but nothing is working! Might my macbook be really dead! have lots of info stored on it! :((

  74. Sarah Balcomb Gardner
    May 26, 2015 at 2:31 am

    Thank you! The power cycle tip did the trick! I was starting to get worried after I worked through the apple troubleshooting guide without results...

  75. Anonymous
    May 21, 2015 at 9:15 pm

    Thanks for the article. I just bought an old Mac book pro 17" 2.4 ghz off craigslist for $300. It worked when the guy showed it to me and I messed around on it for about an hour or two later that night. Then I plugged it in and ... Nada. Battery showed full green light on cord was on... But nothing no beep no fan no screen.
    I was about to find out how cool it would be to run over it in my truck and make a video of how I will never buy Apple again( 1st time apple user )
    And your article got me to try the ole reset thing... well that didn't actually work. BUT, WHAT DID WORK WAS the following.
    I noticed while I was disconnecting and reconnecting the bAttery for the hundredth time, while leaving the power cord plugged in I heard the fans click on for a sec...while the battery wasn't quite pushed in to place yet..puzzled because I was in the process of taking the battery Out when this happened. I noticed after trying a few more times to duplicate my accidental discovery and found that I was pushing my thumb into the bottom case of the laptop, just outside to the lower left corner of where the battery fits in my model A1229 for those of you lucky enough to have this beauty of a relic. And BAMM fans start up...processors running...beep ....YESSSSSSS,,,, SHE'S ALIVE !!! Don't really know what short or flaw or what not that I discovered but she's still working well, and my truck tires shall never meet my laptop now.

  76. Karen Mohl
    May 21, 2015 at 1:46 pm

    Hi, My G5 turned off and wouldn't start again (after I plugged in an old internal HD from a physically broken G5 via SATA-usb to recover some files). I did a Recovery mode as explained above and tried to do a restore from Time Machine back-up, but the back-up disc didn't appear. In Disk Utility it did appear, so I did a copy of the backup disk onto my internal HD, which was probably a bad idea, the computer still wouldn't boot.
    I then tried to do an OS X installation via internet, but the internal HD appears as "locked". I also made an external usb installation media (with DiskMaker) on another computer, but when selecting"Install OS X" from the usb and selecting the internal HD for the installation, I now get the message "This disk is used for Time Machine backups" - apparently because it is indeed a copy of my backup disk!
    So this seems quite locked indeed.
    Does anyone have a solution? Is it possible to unlock the internal HD somehow, e.g. in Disk Utility?

  77. mac newbie
    May 19, 2015 at 5:27 am

    nice,just fixed 2 mac book pro's with your post info ...thanks

  78. Ashvin
    May 12, 2015 at 3:04 pm

    i bought old macbook pro early 2011 but it when start greybackgroundcolor apple appear????

  79. Kirby Lee
    May 3, 2015 at 4:15 pm

    Thanks so much!! Resetting the PRAM did the trick. I was having constant power up issues with my 2009 MacBook Pro that I bought a new battery, installed more RAM, etc. and these did not fix the problem. I was about to give it away and buy a new Mac until I came across your article. I now have a great working laptop again. Thank you!!

  80. Mark
    April 11, 2015 at 12:27 am

    August 2010 - 15" MacBook Pro

    What happened:
    Just clicked and turned off.

    1) Mag Adapter Shows Green when plugged in
    2) pressing the small button on the left side shows full battery charge

    1) Power Cycle - No Luck
    2) SMC Reset - No Luck

    No signs of life at all...

    • Ehran
      September 3, 2016 at 6:42 am

      Same problem here @Mark, did you get it to work ?

  81. Scot Cary
    March 10, 2015 at 11:24 pm

    17" Macbook Pro Core2Duo 2.5Ghz (February 2009) good unit, but overheated and no longer completes a boot. Work in progress.

  82. EL.MO
    March 10, 2015 at 3:37 pm

    I have a Macbook Pro 13" (mid2009) with a 256gb HD. I changed the HD with a new SSD (Samsung Evo830) with the same size. I then made a 1 on 1 copy of my old HD onto the SSD, it works for a while andeven I can shut it down, I can reboot it, put it in hibernation and standby but for a unknown reason after weeks, if I reboot it or shut it down it won't boot up again. I even can't fresh install OSX on that just 1 on 1 copy of my old HD works. I tested with another HD and I just can install a fresh OSX. I thought about compatibility of the SSD but if not compatible it won't works at all. Does anyone have a idea?

    • Jessica C
      March 10, 2015 at 11:10 pm

      Hi EL.MO,

      Sorry I'm not familiar with this sort of issue. Have you tried contacting Apple Support?

      Good luck,

    • EL.MO
      March 11, 2015 at 8:05 am

      Thanks Jessica. No I didn't contact apple support. I know their answer "we don't support Third Party SSD!!" but I think I found the problem. When I activate Trim(with TrimEnabler) on my SSD it doesn't want to boot after time. Yesterday again same problem.
      But thanks for the post and information.


    • FinFin
      March 20, 2015 at 6:33 am

      Trim Enabler has a known Issue since Yosemite where you'd have to disable the check for a kexts checksum (performed by Yosemite to check for non-Apple kexts).
      You will find it right on their site.

  83. Scot Cary
    March 5, 2015 at 2:58 pm

    I'm dealing with an older Macbook Pro, but the information is still valuable for anyone with Macbook problems. Thanks for the post.

    • Jessica C
      March 10, 2015 at 11:08 pm

      Thanks Scot! I aim to include information that would be useful to people even if they aren't dealing with the exact model I am.

      How old is your Macbook Pro?