Mac Won’t Boot? A Step-by-Step Guide to Waking It Up
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Got a desktop Mac or MacBook that won’t turn on, or maybe won’t boot past the Apple logo? Don’t worry—it’s frustrating, but usually fixable.

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Here are all the steps you need to get your Mac started again. Just work through them in order, unless your Mac won’t boot after a failed operating system update. In that case, skip straight to step 8.

1. Check If the Mac Has Power

First, check that your Mac has a power source. Yes, it’s silly and obvious, but anyone who’s done tech support knows that you have to get the obvious fixes out of the way first.

So if your MacBook won’t boot on battery power, plug it in. The battery may be fully depleted, or could be malfunctioning.

If your MacBook won’t charge MacBook Not Charging? Troubleshooting Laptop Power Problems MacBook Not Charging? Troubleshooting Laptop Power Problems You're almost certainly going to have to troubleshoot your MacBook power supply at some point. Here's how to do it. Read More or turn on with the power adapter connected, make sure it’s connected properly and not damaged in any way. Try a different power cable, if you’ve got one around. Also, check that the port is clean. A buildup of dust can disrupt older MagSafe chargers.

And while you’re at it, check your external hardware as well. Disconnect any peripherals like printers or graphics tablets, as these can sometimes be the cause. If you’ve got a Mac Mini, make sure the monitor is connected and powered properly.

2. Run a Power Cycle

The next step is to run a power cycle. This completely cuts all traces of power from the Mac and enables you to restart it from scratch.

  • On a recent MacBook, disconnect the power cable and hold the power button down for 10 seconds.
  • For an older MacBook, disconnect the power cable and remove the battery for at least 10 seconds.
  • If you’re using a desktop Mac, disconnect the power cord for at least 10 seconds.

Now reconnect the power and try to restart your computer. This move may be enough to spring it to life.

Holding the Power button down like this is the equivalent to pressing a “reset” button or pulling the plug. It works on phones, ebook readers, and pretty much every other gadget that doesn’t allow you to remove the battery, so is a good tip to remember.

3. Boot in Safe Mode

safe mode mac

When your MacBook won’t boot, try to remember what you were doing the last time it was working. Were you installing apps, fiddling with fonts, or tweaking the system?

If your Mac shows signs of life when you power it on—it won’t go past the Apple logo or login screen—then booting into Safe Mode How to Repair Your Mac's Disk Using Safe Mode, fsck, and More How to Repair Your Mac's Disk Using Safe Mode, fsck, and More If your Mac won't boot, you can use several methods to try repairing it. Here's how to fix your macOS disk with Safe Mode, fsck, and more. Read More may help you fix it.

Press the Power button on your Mac and immediately press and hold the Shift key. Keep it held until you reach the login screen, then continue as normal.

Safe mode runs a bunch diagnostic tests, then boots a stripped-down version of macOS. This doesn’t load your startup apps, custom fonts, extra hardware features, or anything else beyond the basics.

If your Mac boots successfully into Safe Mode, you can start uninstalling any new apps, disabling startup items, removing hardware, or undoing any other recent changes that may cause the problem.

4. Reset SMC

The System Management Controller (SMC) controls a host of basic Mac functions. It handles everything from the keyboard backlight, to battery management, to what happens when you press the Power button.

Resetting the SMC is a good catch-all solution to many problems, including if your MacBook won’t start or it won’t wake up when you open the lid. There are a few ways to do it, depending on what model of Mac you’ve got:

Desktop Macs

  1. Unplug the power cord and wait 15 seconds.
  2. Plug the cord back in and wait another five seconds.
  3. Restart your Mac.

2018 MacBook Pro + MacBooks With T2 Security Chip

  1. Press and hold the right Shift key, the left Option key (Alt), and the left Control key for seven seconds.
  2. While keeping these keys pressed, hold down the Power button for another seven seconds.
  3. Release all the keys, wait a few seconds, then restart.

MacBooks Without Removable Batteries

  1. Press and hold the left Shift, Option (Alt), and Control keys, plus the Power button (or Touch ID button) for 10 seconds.
  2. Release all the keys then restart your computer.

Older MacBooks With a Removable Battery

  1. Remove the battery.
  2. Press and hold the Power button for five seconds.
  3. Reconnect the battery, and restart the MacBook.

5. Reset NVRAM or PRAM

reset nvram or pram mac

NVRAM (non-volatile random access memory) is a special section of memory that stores certain settings a Mac needs to access quickly. Although problems with this are less likely to render your computer unbootable, resetting it as a precaution will do no harm.

Older Macs used PRAM (perimeter RAM) instead. The process for resetting either is the same:

  1. Press the Power button then immediately press and hold the Option (Alt), Command, P, and R keys.
  2. Keep the keys pressed for around 20 seconds, even if your Mac appears to restart.
  3. If your Mac plays a startup sound, release the keys after you hear it chime for the second time.
  4. If your Mac has the T2 Chip, release the keys after the Apple logo disappears for the second time.

When your Mac has restarted, you’ll find that some basic settings like time zone or volume level might need adjusting.

6. Run Apple Diagnostics

apple diagnostic test

Hopefully by now, your Mac is up and running again. If not you can check for hardware issues by using the Apple Diagnostics tool. This will check for problems, then either suggest fixes or show your support options.

  1. Disconnect any unnecessary external devices, such as a printer. You can leave your keyboard, mouse, and monitor plugged in if needed.
  2. Press the Power button.
  3. Press and hold the D key. Keep it pressed until you see a screen asking you to select your language.
  4. Pick a language, then Apple Diagnostics will begin running its tests. These take a few minutes to complete.

When done, you’ll see the results of the test. Some will suggest quick fixes, and give you the chance to re-run the test. Others will generate reference codes which you can look up on the Apple Diagnostics page. It’ll also show your Mac support options. If there are no issues, then the fault likely is not with your hardware.

On Macs released before June 2013, you’ll get the Apple Hardware Test instead. You activate it in the same way, and the principle is the same. Select your language, then click Test to begin.

apple hardware test

7. Use Recovery Mode Tools

macos recovery

All Macs have a special Recovery partition on the hard drive. This boots independently of the full macOS and gives you access to a suite of tools for repairing your computer.

To boot into Recovery:

  1. Press the Power button.
  2. Press and hold the Command and R keys.
  3. Release the keys when you see the Apple logo.
  4. When it finishes booting, you’ll see a new macOS Utilities menu.

The one to try first is Disk Utility. This is a version of the same tool that’s available in macOS and enables you to scan and repair your hard drive or SSD. Select the drive and click First Aid to begin the repair process.

There are a few more tools available through the Utilities menu. These include the Terminal for more advanced users.

8. Reinstall macOS in Recovery Mode

reinstall macos

If you’ve gotten this far, then it’s likely that your problem is not hardware-related, nor is it a simple software fix. The best solution now is to restore a Time Machine backup, or reinstall macOS entirely How to Reinstall macOS for a Fast and Squeaky Clean Mac How to Reinstall macOS for a Fast and Squeaky Clean Mac Need to restore your Mac to factory settings? Here's how to install a fresh copy of macOS and erase everything. Read More .

You can do this through Recovery. Get started by pressing the Power button and holding down the Command and R keys.

If you’ve got a recent Time Machine backup, you can restore that to see if it solves your problem. If not, choose Reinstall macOS from the menu.

When you choose to reinstall macOS you’re given the option to format your disk as part of the process. Don’t select this if you simply want to repair your installation—there’s no problem with reinstalling macOS on top of itself.

Follow the onscreen guide to complete the installation. You’ll need to be connected to the internet, as the tool will download the operating system from scratch.

Check for Other Warning Signs on Mac

All Macs, whether a high-end MacBook Pro or an older iMac, have great reputations for reliability. But they can still run into problems.

Although it’s often relatively easy to fix a Mac that’s not turning on, it’s best to check for warning signs and patch up problems before they strike.

Follow the advice in our guide to finding and fixing common macOS problems The 8 Best Free Mac Tools to Detect and Fix Common macOS Problems The 8 Best Free Mac Tools to Detect and Fix Common macOS Problems Every Mac user should keep these 8 tools around to fix any problems that may arise, like malware, hardware issues, and more. Read More —covering everything from memory to malware—and you’ll keep your Mac running smoothly and problem free.

Explore more about: Boot Errors, Boot Screen, Hardware Tips, Mac Tips, OS X Mavericks, OS X Yosemite, Troubleshooting.

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  1. Hervey
    November 29, 2018 at 7:25 am

    Mid 2011 MacBook Pro worked with option +command+power

  2. 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.

  3. 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.

  4. 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.

  5. 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."

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

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

  7. 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?

  8. 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.

  9. 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!

  10. 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.

    Thanks!

  11. 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.

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

    THIS WAS VERY HELPFUL. THANKS IN ALL CAPS

  13. 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!

  14. 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

  15. 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

  16. 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.?

  17. 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.

  18. 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.

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

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

  20. 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.
    Chris

  21. 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.

  22. 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.

  23. 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

  24. 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!!

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

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

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

    THANK YOU -
    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....

  27. 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

  28. 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

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

    Power cycle worked for me. Ace!

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

    Its true

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

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

  32. 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.

  33. 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.

  34. 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?

  35. 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.

  36. 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

  37. 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!

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

    Thank you for the power cycle tip! Brilliant?

  39. 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.

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

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

  41. 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...

  42. 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?

  43. 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!!

  44. 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

  45. 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.

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

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

  47. 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...

  48. 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

  49. 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.

  50. 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!!

  51. 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.

  52. 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
    http://www.WebNutrients.com

  53. 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!

  54. 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

  55. 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"

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

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

  57. 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.

  58. 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

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

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

  60. 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.

  61. 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..

  62. 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.

  63. 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.

  64. 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

  65. 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.

  66. 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!

  67. 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?

  68. 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!

  69. 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.

  70. 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.

  71. 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.

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

    update on my comment below. i was looking at this https://discussions.apple.com/thread/4337712?start=0&tstart=0 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.

  73. 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.

  74. 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! :((

  75. 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...

  76. 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.
    PEACE

  77. 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?

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

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

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

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

  80. 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!!

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

    August 2010 - 15" MacBook Pro

    What happened:
    Just clicked and turned off.

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

    Tried:
    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 ?
      thanks

  82. 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.

  83. 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,
      Jessica

    • 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.

      Regards,
      EL.MO

    • 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.

  84. 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?