Download OmniDiskSweeper and analyze your hard drive. OmniDiskSweeper will show you the files on your drive, in descending order by size, and letting you decide what to do with them. Delete away, but exercise caution. OmniDiskSweeper will show detail of space usage: Select System and start cleaning. How to Clean Mac System Storage. We know that the Mac system is intelligent, but at some point, you will see the running out of storage notification. And ultimately, your Mac performance will degrade. There are many data files that occupy an ample space on the storage without being detected.

• How To Clean System Storage Mac
• Cleaning Up Mac Storage
• Clean Up Mac Storage Other
• Macos Mojave Clear System Storage

A slow Mac is no fun for anyone. It happens to the best of us — which is why everyone should know how to declutter and free up disk space on their Mac. Not only will this speed up your computer, it’s also a great opportunity to organize your files.

Clearing disk space on a Mac can make your computer feel like new. Over time, most Macs, especially those that experience regular use, get full of documents, files, apps, images, videos, and other junk and clutter.

In this article, we’ll show you how to free up space on Mac computers, and highlight some apps that make maintenance of your computer’s file system much simpler.

What's taking up space

Have you ever seen this pop up on your Mac?

It’s frustrating! This occurs because the memory your Mac has is full. It may be saved movies, large documents, mail attachments, or just plain cached items from apps like iMessage that are taking up space on your Mac.

Not only is the popup message annoying, diminished disk space on your Mac can prevent you from being productive. Mail attachments or other files may not save to your Mac, all because you’ve got a bunch of old stuff cluttering your memory system. It can even cause apps to quit, or fail to load.

Low disk space isn’t always an 'old Mac' problem, either. While it’s true older Macs typically have less memory available to them, even modern Macs can get cluttered. That’s why it’s important to know how to clear space on Mac hard drives.

How to check storage on Mac

Here’s how to check the storage on your Mac using Apple’s method:

1. From the menu bar on your Mac, click the Apple logo on the top left
2. Select 'About this Mac'
3. Select the 'Storage' option in the new window

This is a basic way to check how much storage is being occupied on your Mac. Another good tip is to check your disk usage with iStat Menus. It’s an app that allows you to monitor – in real time – how your Mac is performing. iStat Menus lives in your Mac’s menu bar, running in the background until you need it. Each of its monitoring services has a menu bar icon, including one for memory.

When you click on the iStat Menus icon, it shows you exactly what’s happening with your disk space. When your Mac is running slowly, it’s possible an app is taking up more resources than you would like. iStat Menus shows you which app is to blame.

How to optimize storage using macOS

If you’re using macOS Sierra or later, you can benefit from Apple’s Optimize Storage functionality. It allows you to store files in iCloud, renewing your access to these files whenever you need. Here’s how to use the Apple way of managing storage on Mac:

1. Repeat the steps above to check the available and used storage on your Mac
2. Click on 'Manage' to access the storage management window
3. Enable the 'Empty Trash Automatically' and 'Reduce Clutter' options to remove files you deleted, and large files you might no longer need.
4. Select 'Store in iCloud' to move your desktop file and docs, photos, and messages to iCloud. You can choose what file types to transfer.

Go to the Optimize Storage menu and choose from three options that help you use storage more cleverly. You can select to remove watched files from your Apple TV app (or iTunes if you use macOS Mojave and earlier), download only recent attachments, or not to delete attachments at all.

Move Files to the Cloud

iCloud is Apple’s preferred method for storing files and folders in the cloud. It makes your data available across devices, and is now the default service for system backups.

Apple gives you 5GB free iCloud storage, but it’s just enough for an iPhone backup and a few gigabytes of pictures. It’s almost never enough for the average user.

Activating it on your Mac will help save room in your system memory, though. It moves the actual storage of files to the cloud, and ann image of those files on your Mac. It also compresses images for optimized storage on the Mac, but keeps them available in the Photos app.

If you have a different cloud storage system you prefer, CloudMounter makes it easy to back your Mac’s files up to Google Drive, Dropbox, OneDrive, Mega, Amazon S3, and other services. It lives in your Mac’s Finder app and menu bar, and makes moving files from your Mac to the cloud as easy as dragging and dropping them into CloudMounter, and directly into your connected cloud account.

Manage large files and archive data

You can find and delete large files on your Mac directly. Here’s how:

1. From the menu bar on your Mac, click the Apple logo on the top left
2. Select 'About this Mac'
3. Select the 'Storage' option in the new window
4. Select 'Manage'
5. Select 'Documents'
6. On the right side of the window, click the 'Size' column header to show the largest files first

We prefer using CleanMyMac X’s file system manager. Here’s how to use it:

1. Open CleanMyMac X on your Mac
2. Select the 'Large & Old Files' module on the right side of the window
3. Select 'Scan'

This is a smarter way of discerning which files are taking up space on your Mac – especially if you don’t need access to those files often. It shows you which types of files they are, how old they are, and lets you delete batches of files by size.

Find and delete duplicate files

When you download an app, it usually has associated files it stores on your Mac. That’s normal; duplicates of those files aren’t. Downloading an app more than once, or even updating an app, can cause it to duplicate existing files on your Mac.

You may also download files more than once. Your Mac is smart, but doesn’t bother checking to see if you already have a file before downloading it again. There’s no clean way to check for duplicates on your Mac. Apple would ask that you look for duplicated filenames in your storage, and delete one of them.

A better way is to use Gemini, an innovative cleanup app built to help you find and eliminate duplicate files on your hard drive. Even better, it can identify near-identical files as well, giving you an easy way to delete the slightly shaky versions of your vacation snaps in one convenient window.

Here’s how to detect and delete duplicate files with Gemini:

1. Open Gemini on your Mac
2. Click the ‘plus’ icon, or drag a folder to the app
3. Select 'Review Results' to delete files manually, or 'Smart Cleanup' to allow Gemini to delete all duplicates

Remove temporary files

Your macOS, your apps, and your browser all use a shortcut called 'caching' to run faster. But over time, those caches fill up with useless information that bogs down your computer.

Why is it important to clear the cache? The short answer is that caches litter and bloat Macs. They aren't just a byproduct of browser history — most systems and apps, such as Pages, Numbers, Keynote, Mail and Photos, create huge amounts of temporary files that linger in the background. These caches of data are essentially just junk files, and they can be safely deleted to free up storage space.

When it comes to cleaning a Mac, you have two options: delete files manually or get a cleaner app to help you. Clearing your cache files with CleanMyMac is the quickest, safest way we know.

Get rid of hidden trash

Another source of system-slowing junk is email and text attachments. Even if you don’t download an attachment, your desktop mail client holds onto a version so that it can show you previews and access the file more easily. 'But I deleted that email!' you say. Often that’s not enough—these downloads can hang around long after the original email is gone.

It’s possible to clean them out manually. You can use the macOS Optimize Storage feature we’ve described above. Choose what exactly you want to be removed — mail attachments, watched video, or both. Still, CleanMyMac X is a much faster option to clean up the trash on Mac. Here’s how to use CleanMyMac X to empty all trash folders on your Mac:

1. Open CleanMyMac X on your Mac
2. Select 'Trash Bins' from the left hand side
3. Select 'Scan' at the bottom of the window
4. Select 'Review Details' to see what CleanMyMac X found, or 'Empty' to delete all trash files on your Mac

Here’s a little trick for you: If you want to be sure you keep the needed files and attachments at your fingertips, use Trickster app to remember them for you. Configure your file tracking inside the app and make sure you’re never confused about what’s stored on your Mac. The important stuff is always in Trickster.

If you want a clutter-free email client, Canary Mail is your perfect choice. The app not only automatically clear away the trash, but also allows to automatically unsubscribe from tons of mailing lists — so that you stop receiving the clutter.

Empty downloads and trash bin

Your Mac’s ‘download’ folder is where most apps, like Safari or Chrome, dump files. It’s also the default folder for email downloads. And it can get really full.

Many of us simply download a file, access it, then forget about it once we’re done with it. The downloads folder can get chock full of files we no longer need, or want. It’s smart to comb through it ever so often and delete files you don’t want, or move them to cloud storage containers using CloudMounter.

Some downloads are hidden, taking up even more space. And the further back you go the more useless these documents are. Do you really need to keep a text file labelled 'Christmas shopping list 2015' or 'Dream holiday Summer 2016?' Probably not. Free up some much-needed space on your Mac and delete as many of these old download files as possible, and remember to come back and tidy it up every few months.

CleanMyMac can help for sure. But also, consider switching your email client to Unibox, which automatically reduces excessive downloads.

AppleInsider described Unibox as 'the best client we tried,' and Macworld said it is 'A welcome, fresh new approach to email on the Mac.' Unibox groups emails by sender and includes an attachment list, so you can quickly find what you need, then delete those documents out of the Downloads folder.

Uninstall unused apps

Have you ever downloaded an app, then stopped using it? We all have! Those apps occupy memory on your Mac – sometimes a lot of space, too.

CleanMyMac X has a handy 'Uninstaller' module which makes it easy to identify and remove all unwanted apps from your Mac. It even deletes associated files, so all traces of an unused app are taken away.

Get rid of old backups

Something else that comes as a surprise to most Mac users is just how many backups your system carries at any given time. Copying and pasting, and the duplicate feature make it too easy to replicate your work in different folders.

At the same time, you’ve probably got dozens of cached backups of files and documents that are invisible but taking up more space than you’d want. Like Time Machine backups. Every time you use Apple’s built-in backup utility, it creates local snapshots that are stored locally on your Mac. This may result in up to 100 GB Time Machine clutter on your hard drive.

CleanMyMac will find old backups for you and remove them in a click. In its 'Maintenance' module, you can select 'Time Machine Snapshot Thinning' to automatically remove older Time Machine backups you no longer need.

But also, switch your backup client to Get Backup Pro to backup only those units you want (for Mac). If you need to quickly transfer files or folders to another server, use a backup sync app ChronoSync Express.

If you want to quickly backup your iOS device on Mac — for instance, before hard resetting or factory resetting iPhone — you can use AnyTrans. You can even schedule instant backups to never worry about losing data when syncing your iOS device with Mac.

Get rid of desktop clutter

Organizing your Mac desktop doesn’t directly help your memory woes, but it can help you find files faster and avoid multiple downloads of the same file.

Apple’s chosen method is called Stacks. A simple right-click on your desktop brings up a menu; selecting 'Use Stacks' puts your files into folders by type. Images, screenshots, and other files will be held in expandable folders, decluttering your desktop for good. Future downloads will all fall into those categories, too.

You may prefer Spotless, an app that affords you far more control over how your desktop is organized. You can set rules for organization, and tuck files into other folders on your Mac by dragging and dropping into one location. Spotless takes care of the hard work for you!

You deserve a faster Mac

By eliminating both hard disk and desktop clutter, you’ll improve your Mac’s performance as well as your own workflow. Plus, Setapp’s decluttering, disk cleanup, and analysis apps help you complete what would be a tedious chore in just a few clicks. There’s no telling how much time and effort you’ll save by giving yourself (and your Mac) a break.

There are plenty of great ways to manage your Mac’s memory without rushing out to buy a new computer. We’ve shown you the best ways here!

All the apps we mentioned in this article are available for free during a seven day trial of Setapp, the world’s best suite of productivity apps for the Mac. In addition to ClanMyMac X, Spotless, Gemini, CloudMounter, Get Backup Pro, and ChronoSync Express, you’ll have unlimited access to Setapp’s full catalog of nearly 200 Mac apps. When your free trial is over, Setapp is only $9.99 per month. Give it a try today!

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

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Solid-state storage (SSD) is fantastically fast, but its high cost means that Macs with built-in SSD startup drives have a much lower capacity than their hard disk-based counterparts. This can be a problem if you have a large collection of photos or music files, or if you use your Mac to edit video. And so, if you have an SSD, you probably spend a lot of time checking the Storage tab in About this Mac. One thing you’ll have noticed is that colored bar labeled ‘System’. What is it and how do you clear it? Read on and find out.

What is System storage on Mac?

System storage, obviously, contains the macOS itself but what else is there? Part of this storage includes applications, drivers, volume data, and Library. While the nominal size of the macOS is around 12 GB (for macOS Big Sur), the Library is the real space-hogger. It contains piles of old cache files and supporting data.

How To Clean System Storage Mac

Why does the system take so much space on Mac?

Your system is mainly stored in both the System and Library folders. If your system is taking up too much disk space on Mac, explore those two folders and see what's stored in them.

If you’re having a lot of your space allocated for “system,” you may have Time Machine snapshots stored on your Mac. Later in this article, we’re going to explain how to remove Time Machine backups.

How to reduce system storage on Mac

1. Check for unnecessary files in System storage

Much of the storage space used by the OS for system-related tasks is cleared when macOS deletes the files automatically, but sometimes that doesn’t happen, which is why the System category can grow very large. Apple doesn’t explain what comprises this category of storage, but it’s likely that the following are part of it:

• Time Machine backups
• Old iOS backups
• File Vault files
• App cache files
• Unused disk images

Not knowing what files are included in System storage makes finding them tricky. However, it’s far from impossible. My favorite tool for clearing unnecessary system junk from my Mac is CleanMyMac X. It has lots of tools for clearing out junk files, but for our purposes, there’s one that really helps: System Junk. This handy utility scans your Mac and identifies things like temporary files, translation files in apps, broken preferences files, old updates, and system cache files that are no longer needed. You can then remove them with one click. Or you can choose which ones you want to get rid of and remove just those. If you want to give it a go, you can download a free version of CleanMyMac X here.

Once you’ve downloaded and installed it, do this:

1. Launch CleanMyMac X.
2. Choose System Junk in the sidebar.
3. Press Scan.
4. Once it’s finished, if you’re happy to remove the files CleanMyMac recommends, press Clean.
5. If not, choose Review Details and go through the list of results.
6. Uncheck the box next to any items you don’t want to delete.

That will help you to get rid of system storage on Mac.

As you can see from the screenshot, the app offers to remove my Unused Disk Images (the remains of DMG installers), broken downloads, old app updates. If you use Photoshop or other media editor you’ll see the option to delete Document Versions — intermediate edits of your files. In other words, you have many options for freeing up space at your disposal.

2. Manually remove Time Machine backups

Aside from using CleanMyMac X, one of the most straightforward ways to clear system storage on a Mac, is to get rid of Time Machine backups. Wait, what? You thought Time Machine backups were stored on an external or network drive? They are! But macOS also keeps a copy of your backup on your startup drive, in case the external drive isn’t available when you need to restore files. That way you can restore data on a MacBook even when you’re on the move.

macOS should delete Time Machine backups when your Mac runs low on storage, but it doesn’t always work out that way. And besides, you might not want to wait until your Mac is short of space before you delete them. So, here’s how to reduce system storage on a Mac by deleting Time Machine backups. Remember that will delete local copies of your backups, so if you think you might need them, don’t do it.

1. Go to Applications > Utilities and launch Terminal.
2. When a Terminal window opens, type: tmutil listlocalsnapshotdates
3. Press Return.

You will now see a list of stored Time Machine backups, listed by date.

1. Type: tmutil deletelocalsnapshots xxxxxxx where ‘xxxxxxx’ is the name of one of the backups listed . This will take the form of a date followed by a text string.
2. Press Return.
3. Repeat steps 1 and 2 for as many backups as you want to remove, checking the Storage tab in About this Mac each time to see how much space you’ve cleared.

3. Optimize your storage

If you’ve faced a cluttered storage situation, there’s another way to fix it. Apple has anticipated such an issue and equipped the macOS with some features to optimize your space.

Go to the Apple menu and select About This Mac. Select the Storage tab and press Manage. In the window that appears, you can see some of the useful suggestions. 'Store in iCloud' lets you transfer all your data to cloud storage and reclaim some GBs on your Mac. The second option allows you to delete the heaviest files, like movies and programs.

Turning on 'Empty Bin Automatically' can be a useful option if you forget to do it regularly.

By pressing Review Files, you will jump into the Documents section. Review the files that are stored on your Mac and pay attention to the Unsupported Apps category. It can contain some programs that can no longer run on your macOS version.

Bonus tip: remove duplicate files

Aside from the bizarre system files, another thing that nibbles on your storage is duplicates. Remember that track you’ve accidentally added twice? Or a mail attachment you’ve opened several times? All these files just sit on your Mac and take up precious space.

Here’s how you can quickly delete them in a few clicks.

1. Download and open Gemini 2
2. Choose a folder and click Scan for Duplicates
3. Wait for the scan to finish

Now you can Click Smart Cleanup to get rid of detected duplicates and delete system storage on Mac. Or click Review Results if you want to double-check what’s being deleted.

What else can you do to reduce System storage on Mac?

Cleaning Up Mac Storage

Believe it or not, one thing you can do is wait. When you first choose the Storage tab in About this Mac, macOS seems to allocate quite a lot to System that it then reallocates elsewhere. For example, some users have reported that after waiting for a few minutes, much of the storage that was labeled System, is moved to the iCloud label. So if you wait, you might find that the System isn’t taking up disk space in the huge quantities that it seemed to be at first.

The other thing you can do is investigate what files are designated as ‘System’. We’ve already talked about Time Machine backups, but everything stored in your Mac’s System or Library folders comes under the ‘System’ heading in About this Mac. That is:

/Library

/System

~/Library

~/System

Click on the Go menu in Finder and select Go to Folder, then paste in each of the paths above in turn.

Clean Up Mac Storage Other

Go through the subfolders in each and press Cmd-I to Get Info and check how much data is in each. You’ll quickly discover where your precious storage has gone.

It’s likely that much of it is accounted for by cache files for apps like Photos and Safari. MacOS caches as much data as it can to avoid having to re-download it, which boosts performance. And it’s smart enough to know that it must delete cache files when you run low on storage.

If you decide that you don’t want to leave it up to the operating system to free up storage, don’t just start trashing cache files or folders randomly, you might delete something you shouldn’t. So be careful

Another way to go about it, is to use a storage analyzer. There are nice apps that search for hidden space on Mac and reveal your largest folders. You can use a free version of CleanMyMac X and inside it, it has a feature called 'Space Lens.'

Those bubbles show your largest folders and you can zoom in and out and delete junk files right from there.

A fun and visual way to delete system storage on Mac.

Macos Mojave Clear System Storage

System storage can occupy tens of gigabytes of space on your Mac for Time Machine backups and cache files. It should be managed by macOS so you’re never short of space. But if you want to do a system storage cleanup, or just free up more space on your Mac, give CleanMyMac X a go. You might be surprised by how much space you get back.