How To Clean Mac System Storage



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Checking your storage on Mac isn't difficult – but managing it can be. One of the more curious storage compartments is the 'other' storage on Mac, which sounds like a catch-all for files that can't be labeled properly.

And that's sort of true! But the other volumes in container can get full, and reduce the Mac storage Other space for your Mac. And keep in mind there's no 'how to get rid of other on Mac' option; the partition isn't there to delete totally. Here we'll show you how to check your other space, and offer guidance on managing it.

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How to Check Storage on Mac

This will be quick! Just follow these directions:

  • Click the Apple logo on the top left of the menu bar
  • Select 'About This Mac'
  • Choose 'Storage'

And there you go! That's the simple way to check the storage available on your Mac. Now, do you see that 'Manage…' button on the right-hand side of the window? Click it!

Depending on how you use your Mac and what apps you run, that 'other' category could be taking up quite a bit of space, and you could free it up very easily — potentially saving yourself from having to buy additional storage.

View and Manage the Other space on Mac

How

The next window you arrive at shows how Apple manages your system memory. In macOS Sierra, Apple added a default feature named 'Optimize' that helps balance the load between cloud storage and on-device memory use. As you can see in the window (below), 'System' and 'Other' are greyed-out.

This is because the other space is tricky to manage, and required digging into the Library on your Mac. As we cautioned in our article on deleting apps from your Mac, foraging through Library is a tad frightening, so proceed with caution.

But what is other on Mac? In essence, it's caches, plug-ins, and documents macOS wants to keep around. Here's how to open Library, so we can start to discover what 'other' is on Mac:

  • Open Finder
  • Select 'Go' from menu
  • Hold down 'option' key on keyboard; you should see a new option for 'Library'
  • While holding down the option key, select 'Library'

You'll see a Library folder in the list. Click it to see all your apps and associated files. There are also folders with names like 'Caches.'

We can't caution you enough: if you're not sure what it is you're looking for, don't delete it – and remember you can't delete Other on Mac entirely. There's a reason Apple hides the Library; small changes can have deep, lasting effects.

But, if you know what needs deleting, this is where you'll find it. If you're positive an app's files or plugins need to go, this is where you'll find them. Simply right-click the folder or file you want gone, and select 'move to trash.' Then empty the trash can, and you're done. This is how you remove files from the Other storage category.

But that's scary stuff. We have a better way

The Best Way to Reduce Other Storage on Mac

Apple's Optimize service is great for Macs with tons of on-board storage, mostly because those machines need very little interaction when it comes to managing files and storage space.

The best option is to find a file manager you can control. ForkLift is a really solid option that brands itself as a replacement for Finder – and it's not wrong. You can connect multiple servers (FTP, SFTP, Amazon S3, AFP, WebDAV, SMB, and NFS), and archive unnecessary files or folders. Like Finder, it has a preview for files you're accessing, and also lets you compare files so you can delete duplicates as needed.

A much more robust method is with CleanMyMacX. This app is almost a must-have for any Mac owner. It managed files, folders, apps, extensions, updates, mail attachments, and the trash bin. But it's core function is to make sure your Mac is optimized, and it does an amazing job.

Reduce storage with CMM X

Install CleanMyMac X and forget about manual storage cleaning. The app wipes away all junk from your Mac in seconds.

With CleanMyMacX, all you have to do is activate its Smart Scan feature. It discovers unnecessary files for you, and optimizes your Mac for speedier performance. It even makes sure your Mac has no malware!

Trusting CleanMyMacX to do its job correctly is never a question, but you can dig deeper if you like. Once a smart scan is complete, you can select 'review details' under the Cleanup task before you select 'run.' In this details log, you'll see two main categories: system junk, and trash bins.

System Junk is where those pesky cache files are, along with log files. You can choose 'show' to see which caches CleanMyMacX is getting rid of, too.

Conclusion

The one thing to remember about other storage on Mac is it's not always going to vanish. Your Mac stores all kinds of things there, like application support and font files. You need that stuff – and is again why we caution you not to simply clear out everything in your Library that doesn't immediately resonate.

But you don't always need caches, and cleaning your files manually can take a long time. When you're ready to clear 'Other' on Mac, it's almost always because you want it to run smoother, or stay running at optimal performance levels.

This is why we advocate for apps like ForkLift and CleanMyMacX. Even if you want the more manual controls ForkLift offers, its ease of use makes storage management faster and easier.

We think most will find value in CleanMyMacX, too. Its simple one-click optimization makes system maintenance a breeze!

Best of all, both ForkLift and CleanMyMacX are available free as part of a seven day trial of Setapp. In addition to these apps, you get access to dozens of other handy macOS apps!

Setapp lives on Mac and iOS. Please come back from another device.

Meantime, prepare for all the awesome things you can do with Setapp.

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How To Clean Mac System Storage

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Optimized Storage helps you save storage space space by storing your content in iCloud and making it available on demand:

  • When storage space is needed, files, photos, movies, email attachments, and other files that you seldom use are stored in iCloud automatically.
  • Each file stays right where you last saved it, and downloads when you open it.
  • Files that you’ve used recently remain on your Mac, along with optimized versions of your photos.

If you haven't yet upgraded to macOS Sierra or later, learn about other ways to free up storage space.

Find out how much storage is available on your Mac

Choose Apple menu  > About This Mac, then click Storage. Each segment of the bar is an estimate of the storage space used by a category of files. Move your pointer over each segment for more detail.

Click the Manage button to open the Storage Management window, pictured below.

How to clean mac system storage

Manage storage on your Mac

Clean Storage On Mac

The Storage Management window offers recommendations for optimizing your storage. If some recommendations are already turned on, you will see fewer recommendations.

Store in iCloud

Click the Store in iCloud button, then choose from these options:

  • Desktop and Documents. Store all files from these two locations in iCloud Drive. When storage space is needed, only the files you recently opened are kept on your Mac, so that you can easily work offline. Files stored only in iCloud show a download icon , which you can double-click to download the original file. Learn more about this feature.
  • Photos. Store all original, full-resolution photos and videos in iCloud Photos. When storage space is needed, only space-saving (optimized) versions of photos are kept on your Mac. To download the original photo or video, just open it.
  • Messages. Store all messages and attachments in iCloud. When storage space is needed, only the messages and attachments you recently opened are kept on your Mac. Learn more about Messages in iCloud.

Storing files in iCloud uses the storage space in your iCloud storage plan. If you reach or exceed your iCloud storage limit, you can either buy more iCloud storage or make more iCloud storage available. iCloud storage starts at 50GB for $0.99 (USD) a month, and you can purchase additional storage directly from your Apple device. Learn more about prices in your region.

Optimize Storage

Click the Optimize button to save space by automatically removing watched movies and TV shows. When storage space is needed, movies or TV shows that you purchased from Apple and already watched are removed from your Mac. Click the download icon next to a movie or TV show to download it again.

Your Mac will also save space by keeping only recent email attachments on this Mac when storage space is needed. You can manually download any attachments at any time by opening the email or attachment, or saving the attachment to your Mac.

Optimizing storage for movies, TV shows, and email attachments doesn't require iCloud storage space.

Empty Trash Automatically

Empty Trash Automatically permanently deletes files that have been in the Trash for more than 30 days.

Reduce Clutter

Reduce Clutter helps you identify large files and files you might no longer need. Click the Review Files button, then choose any of the file categories in the sidebar, such as Applications, Documents, Music Creation, or Trash.

You can delete the files in some categories directly from this window. Other categories show the total storage space used by the files in each app. You can then open the app and decide whether to delete files from within it.

Learn how to redownload apps, music, movies, TV shows, and books.


Where to find the settings for each feature

The button for each recommendation in the Storage Management window affects one or more settings in other apps. You can also control those settings directly within each app.

  • If you're using macOS Catalina or later, choose Apple menu  > System Preferences, click Apple ID, then select iCloud in the sidebar: Store in iCloud turns on the Optimize Mac Storage setting on the right. To turn off iCloud Drive entirely, deselect iCloud Drive.
  • If you're using macOS Mojave or earlier, choose Apple menu > System Preferences, click iCloud, then click Options next to iCloud Drive. Store in iCloud turns on the Desktop & Documents Folders and Optimize Mac Storage settings.
  • In Photos, choose Photos > Preferences, then click iCloud. Store in iCloud selects iCloud Photos and Optimize Mac Storage.
  • In Messages, choose Messages > Preferences, then click iMessage. Store in iCloud selects Enable Messages in iCloud.
  • If you're using macOS Catalina or later, open the Apple TV app, choose TV > Preferences from the menu bar, then click Files. Optimize Storage selects “Automatically delete watched movies and TV shows.”
  • In you're using macOS Mojave or earlier, open iTunes, choose iTunes > Preferences from the menu bar, then click Advanced. Optimize Storage selects “Automatically delete watched movies and TV shows.”
  • In Mail, choose Mail > Preferences from the menu bar, then click Accounts. In the Account Information section on the right, Optimize Storage sets the Download Attachments menu to either Recent or None.

Empty Trash Automatically: From the Finder, choose Finder > Preferences, then click Advanced. Empty Trash Automatically selects “Remove items from the Trash after 30 days.”

Other ways that macOS helps automatically save space

With macOS Sierra or later, your Mac automatically takes these additional steps to save storage space:

How To Clean Macbook Pro

  • Detects duplicate downloads in Safari, keeping only the most recent version of the download
  • Reminds you to delete used app installers
  • Removes old fonts, languages, and dictionaries that aren't being used
  • Clears caches, logs, and other unnecessary data when storage space is needed

How to free up storage space manually

Even without using the Optimized Storage features described in this article, you can take other steps to make more storage space available:

  • Music, movies, and other media can use a lot of storage space. Learn how to delete music, movies, and TV shows from your device.
  • Delete other files that you no longer need by moving them to the Trash, then emptying the Trash. The Downloads folder is good place to look for files that you might no longer need.
  • Move files to an external storage device.
  • Compress files.
  • Delete unneeded email: In the Mail app, choose Mailbox > Erase Junk Mail. If you no longer need the email in your Trash mailbox, choose Mailbox > Erase Deleted Items.
Mac

Learn more

  • The Storage pane of About This Mac is the best way to determine the amount of storage space available on your Mac. Disk Utility and other apps might show storage categories such as Not Mounted, VM, Recovery, Other Volumes, Free, or Purgeable. Don't rely on these categories to understand how to free up storage space or how much storage space is available for your data.
  • When you duplicate a file on an APFS-formatted volume, that file doesn't use additional storage space on the volume. Deleting a duplicate file frees up only the space required by any data you might have added to the duplicate. If you no longer need any copies of the file, you can recover all of the storage space by deleting both the duplicate and the original file.
  • If you're using a pro app and Optimize Mac Storage, learn how to make sure that your projects are always on your Mac and able to access their files.




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