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macOS is full of handy little applications that perform some of the more mundane computing tasks Your Mac Has Built In Tools For These 10 Everyday Tasks Your Mac Has Built In Tools For These 10 Everyday Tasks Want to dictate notes, look up words, and merge PDFs? Your Mac has in-built tools for these tasks and more! Read More you may encounter. Things like taking screenshots How To Take Screenshots On Your Mac: Tips & Tools How To Take Screenshots On Your Mac: Tips & Tools There are many ways to take screenshots with OS X, using both built-in and third-party tools — each with its advantages and disadvantages. Here's everything you need to know. Read More , making quick screen recordings 7 Handy Tasks QuickTime Player Performs for Free 7 Handy Tasks QuickTime Player Performs for Free You've probably changed the file association so QuickTime never gets used, so you've probably overlooked its bounty of useful features. Read More , and the ability to resize photos.

There are a few ways to resize images on your Mac. You can use the now-defunct iPhoto, its replacement Photos, or the jack-of-all-trades Preview document and image viewer.

For Most Tasks: Resize Using Preview

Preview is a robust application that can be used to do all sorts of things, from viewing images, reading documents and even signing PDFs using your touchpad 8 Ways To Sign A PDF From Windows, Mac & Mobile Platforms 8 Ways To Sign A PDF From Windows, Mac & Mobile Platforms When you get that contract via email, what do you do? You have to print the last page, sign it, scan it, and email it back — surely MakeUseOf, there must be a better way? Read More . One of its most useful features is the ability to resize images, and it’s probably more useful than Photos or iPhoto when it comes to this task.

preview-resize

Preview does not require you import an image into a library first, and it allows you to unlock the aspect ratio so you can stretch or squish the image if you really want to. For that reason, Preview is probably the best choice when it comes to quick resizing jobs for images other than those in your Photos or iPhoto libraries.

  1. Double click on your image to open it with Preview. You can also select multiple images in Finder and double click your selection to open them all in Preview.
  2. Head to Tools > Adjust Size (remember to select multiple photos using command+click if you want to batch resize).
  3. Use the Fit into box to specify a preset value, or input your own width and height into the boxes provided. Click the padlock to scale disproportionally, which will stretch the image beyond its current ratio.
  4. Hit OK when you’re done, then use File > Save to overwrite, or File > Export to specify a file format and image quality (again, command+click for batch export).

Resize Using iPhoto

Apple replaced iPhoto with their new Photos app in April 2015. You may still have iPhoto available on macOS though, and you can even download it from the Purchases tab in the Mac App Store. If you’re using an older Mac that isn’t compatible with the latest version of macOS, it’s likely iPhoto is all you’ll have available to you.

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iphoto-is-dead

In order to resize an image with iPhoto, that image will need to be in your iPhoto library. If you use iPhoto to import your images from an iPhone or digital camera then this is already done. If you’re grabbing an image from the web, the best way is to import it is by dragging the image into an iPhoto window, or its associated dock icon.

iphoto-resize

Once you have the image in your library, you can export and resize it as you see fit. iPhoto will maintain the image aspect ratio, so you can’t stretch the image unnaturally.

  1. Launch iPhoto and select your image, or multiple images.
  2. Head to File > Export.
  3. Under Size you can choose Full SizeLargeMedium or Small presets, and Custom allows you to set your own size (in pixels).
  4. Choose Custom to specify a maximum Width or Height, or choose Dimension to limit both width and height to the number you provide.
  5. Hit Export and choose a location in which to save the image.

You can also choose the file type, compression quality, whether or not to strip location information, and set a prefix filename which is handy for exporting a series of images that follow a naming convention — e.g. “beach1.jpg” and so on.

Resize Using Photos

Photos is an iPhoto replacement that more closely resembles the iOS app of the same name. It has been steadily improving since its introduction, and you can even use it to edit RAW photos The Best Free RAW Image Processors For Mac OS X The Best Free RAW Image Processors For Mac OS X Photoshop is expensive, and while many are happy to fork out a monthly fee for Adobe's revised Creative Cloud system, others will always turn to free software first. One thing is for sure: if you're... Read More or import your own custom filters. Resizing an image in Photos is virtually identical to the process used by its predecessor, iPhoto.

photos-resize

Just like iPhoto you’ll need to import the image into your library before you can do anything to it. Images added from your iPhone, digital camera, or SD cards will already be in your library. Images from the web or other sources will need to be dragged into the Photos window or onto its dock icon first.

  1. Launch Photos and select your image, or multiple images.
  2. Head to File > Export 1 Photo (or however many you are resizing).
  3. Under Size you can choose Full SizeLargeMedium or Small presets, and Custom allows you to set your own size (in pixels).
  4. Choose Custom to specify a maximum Width or Height, or choose Dimension to limit both width and height to the number you provide.
  5. Hit Export and choose where you want to save the image.

You can choose the filetype, compression quality, whether to omit embedded location information, and choose a color profile if you want to.

Note: You also have the option to Export Unmodified Original, which is what you should choose if you’re printing your images or plan on editing them in an external editor like Photoshop or Pixelmator How to Use Photos for OS X With Photoshop, Pixelmator and Other Image Editors How to Use Photos for OS X With Photoshop, Pixelmator and Other Image Editors Get your Photos images into Photoshop, Pixelmator and other applications despite the new restrictions put in place by Apple. Here's how. Read More .

Which Do You Use?

Do you still use a heavyweight like Photoshop to do your resizing, or is Preview good enough for you? Maybe you use a slick Automator script to resize your images? Let us know what you prefer in the comments below!

Original article by Bakari Chavanu.

  1. Gregory252
    November 12, 2015 at 1:23 pm

    That is why I always prefer to do the things with a Photoshop instead of any other program. All other softwares are not good as Photoshop and for me personally it is the most simple solution. Image Size menu have everything for perfect resizing photos so who is beginner maybe can check this tutorial : http://pc-problem-solutions.blogspot.rs/2015/11/how-to-resize-photo-in-photoshop-cs3.html . Do not complicate your life with useless things like photo resizing...

  2. bunny
    June 5, 2011 at 7:06 pm

    Actually, even though resizing appears to be simple two-click process in Preview, images continue to PRINT out in the full/original size rather than at the "resize" selected. Does anybody have a solution for that.

  3. Egqegwe
    May 15, 2011 at 1:18 am

    It should be as simple as File-->Resize then it takes you to a dialog that says "Height __ PX" and "Width __ PX"

    • Egqegwe
      May 15, 2011 at 1:25 am

      Even easier, you can use Preview instead of iPhoto, then go to Tools-->Adjust Size. iPhoto is junk

  4. Bakari
    March 29, 2011 at 2:40 pm

    OttifantSir, I’m not a Mac fanboy trying to defend Apple’s products. There are many times I get just a frustrated as you about why certain features or processes are missing in Apple software, or any software for that matter. As for resizing photos in iPhoto, I’m personally don’t see it as difficult as you describe. I read your comment two times, and maybe I’m missing the point and the specific problem. I apologize for not seeing that.
    Why do you find selecting a photo and clicking File>Export, and choosing a resize option as such a huge problem? Could suggest a better way that it could be done? This is a real question, not a defense of Apple. IPhoto is not Photoshop, but on this particular case, I’m sorry but I’m just not seeing your point. Finally, please don’t take my response as one of arguing with you. I’m just trying to get clarity about your concerns.

  5. Christian Hagen
    March 23, 2011 at 7:44 pm

    No resize tool available for Apple's iPhoto? And it costs money? This really shows that Macheads are just a bunch of cult-mmbers under The Church of Jobs.

    And they will now come and defend their precious program, saying it can resize, and how could I not have read the article, just the headline. I DID read the article. There's two ways this article describes as ways of paying (if you didn't spend some extra money already when you bought your Mac) to resize your pictures: Email them, or export them. Preferrably to a different format it seems.

    But I am not interested in the POSSIBILITY of resizing pictures with iPhoto. Every Apple-fanboy and -girl out there says Mac is SOOOOO easy to use. "You just sit down, and presto!, two minutes later you're surfing the Web with the same ease as someone who's spent days, or even weeks, configuring their Windows-PC. And don't start me on that geek-only OS Linux. Who the h*** wants to mess around with settings on their computer?" I am interested in the USERFRIENDLINESS of iPhoto. And this article shows me iPhoto ISN'T userfriendly. I can't tell how many times I've met limitations on image size online. If I had had a Mac, I wouldn't have been able to post those pictures.

    Macheads again: "But you can just email them to yourself or export them!" Yes, and after a while I might have found out that. But I also have more than 20 years experience with computers, and I know that if you're looking for a tool, it's not always obvious, and the menus aren't there ONLY for the professionals. But, take my family: Mom needed practically a two-day course in using Picasa. My sister doesn't even know how to install/uninstall a program without a 7-page booklet from me with pictures. My father doesn't care about computers, except for being pro-Windows. My brother can't be bothered to learn anything besides setting up Call of Duty and play that. Somehow, they all take pictures and load them onto their PC. Sometimes they upload them, and sometimes they need to resize them.

    I know what the reactions would be to iPhoto. Mom: Can you help me resize my pictures? Why do you do that? Why isn't there a button or choice to resize? (Two days later, on the phone) How did I resize my pictures again? You got to come over and help me. Now. Sis: I tried using it, but I wanted to resize some photos, and couldn't, so I gave it up. D***! POS program can't even do that! It was so easy in Windows (Paint.net, Picasa, Gimp, built-in, etc), why is it so hard on a Mac? I'll never again use ANYTHING from Apple. Dad: What does it do? Show pictures? Can it do more? Email pictures, huh? That's a nice touch. (Three weeks later, on the phone) My buddy can't see the pictures, they're too small. I tried using the other choices, but then he can't receive my e-mail, it's too big. Can you help me? Brother: (Six months later) I just tried importing my pictures to iPhoto a few months ago, but something went wrong. I don't know what, and I haven't tried anymore since, so I don't know if it's fixed or not. (I sit down, he tells me what he did, no problem importing) Huh, guess it's fixed then. (Three months later) The day after you helped me with iPhoto, I tried importing some other pictures, and the fault came up again. Can you come over some day and fix it again? (I know, importing and resizing are two different things, and importing pictures is available and easy in practically all image editors. But, that's my brother's view)

    As you can see, there's a point to this story: I am the geek, and I am expected to know the solution to all their computer problems, even if I, as in the case of Apple-products, have never owned or used any of them. And also, if Macs are supposed to be so userfriendly, then why hide one of the most important and easily implemented features under the un-intuitive heading of Export in a menu. Why not right-click? Oh, that's right. Macs don't have two buttons on their mouse. If you want a right-click menu, you have to CMD-Click. (I wonder if that's the reason why, after 20 years of Windows and Linux experience, when I try a Mac at a computer store, it's impossible to do anything but look at the background and the dock. I know they're locked down to some degree, but I should be able to open the programs to see the interface, right?)

    (Climbing off my soap box....)

    In short: Thanks for showing the world how idiotic Apple is in their GUI-decisions.

  6. OttifantSir
    March 23, 2011 at 8:44 pm

    No resize tool available for Apple's iPhoto? And it costs money? This really shows that Macheads are just a bunch of cult-mmbers under The Church of Jobs.

    And they will now come and defend their precious program, saying it can resize, and how could I not have read the article, just the headline. I DID read the article. There's two ways this article describes as ways of paying (if you didn't spend some extra money already when you bought your Mac) to resize your pictures: Email them, or export them. Preferrably to a different format it seems.

    But I am not interested in the POSSIBILITY of resizing pictures with iPhoto. Every Apple-fanboy and -girl out there says Mac is SOOOOO easy to use. "You just sit down, and presto!, two minutes later you're surfing the Web with the same ease as someone who's spent days, or even weeks, configuring their Windows-PC. And don't start me on that geek-only OS Linux. Who the h*** wants to mess around with settings on their computer?" I am interested in the USERFRIENDLINESS of iPhoto. And this article shows me iPhoto ISN'T userfriendly. I can't tell how many times I've met limitations on image size online. If I had had a Mac, I wouldn't have been able to post those pictures.

    Macheads again: "But you can just email them to yourself or export them!" Yes, and after a while I might have found out that. But I also have more than 20 years experience with computers, and I know that if you're looking for a tool, it's not always obvious, and the menus aren't there ONLY for the professionals. But, take my family: Mom needed practically a two-day course in using Picasa. My sister doesn't even know how to install/uninstall a program without a 7-page booklet from me with pictures. My father doesn't care about computers, except for being pro-Windows. My brother can't be bothered to learn anything besides setting up Call of Duty and play that. Somehow, they all take pictures and load them onto their PC. Sometimes they upload them, and sometimes they need to resize them.

    I know what the reactions would be to iPhoto. Mom: Can you help me resize my pictures? Why do you do that? Why isn't there a button or choice to resize? (Two days later, on the phone) How did I resize my pictures again? You got to come over and help me. Now. Sis: I tried using it, but I wanted to resize some photos, and couldn't, so I gave it up. D***! POS program can't even do that! It was so easy in Windows (Paint.net, Picasa, Gimp, built-in, etc), why is it so hard on a Mac? I'll never again use ANYTHING from Apple. Dad: What does it do? Show pictures? Can it do more? Email pictures, huh? That's a nice touch. (Three weeks later, on the phone) My buddy can't see the pictures, they're too small. I tried using the other choices, but then he can't receive my e-mail, it's too big. Can you help me? Brother: (Six months later) I just tried importing my pictures to iPhoto a few months ago, but something went wrong. I don't know what, and I haven't tried anymore since, so I don't know if it's fixed or not. (I sit down, he tells me what he did, no problem importing) Huh, guess it's fixed then. (Three months later) The day after you helped me with iPhoto, I tried importing some other pictures, and the fault came up again. Can you come over some day and fix it again? (I know, importing and resizing are two different things, and importing pictures is available and easy in practically all image editors. But, that's my brother's view)

    As you can see, there's a point to this story: I am the geek, and I am expected to know the solution to all their computer problems, even if I, as in the case of Apple-products, have never owned or used any of them. And also, if Macs are supposed to be so userfriendly, then why hide one of the most important and easily implemented features under the un-intuitive heading of Export in a menu. Why not right-click? Oh, that's right. Macs don't have two buttons on their mouse. If you want a right-click menu, you have to CMD-Click. (I wonder if that's the reason why, after 20 years of Windows and Linux experience, when I try a Mac at a computer store, it's impossible to do anything but look at the background and the dock. I know they're locked down to some degree, but I should be able to open the programs to see the interface, right?)

    (Climbing off my soap box....)

    In short: Thanks for showing the world how idiotic Apple is in their GUI-decisions.

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