1. (Lucas's MacLifeHacks #23)Is your Mac startup disk full? Here's the quick fix to free up space! Reclaim the space eaten up by 'Other'.Subscribe for more life.
2. You can free up space on your Mac by manually deleting files and emptying your trash. You can also zip files or store them on iCloud to clear space on a Mac. Decluttering apps can help to quickly.

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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.

To free up disk space, it’s helpful to know exactly what is using disk space on your Mac. A hard disk analysis tool like Disk Inventory X will scan your Mac’s hard disk and display which folders and files are using up the most space. You can then delete these space hogs to free up space. Free up storage space on your Mac Save space by storing your content in iCloud or using built-in tools to find and remove large or unneeded files. The Optimized Storage features of your Mac help you save storage space by storing your content in iCloud and making it available on demand.

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. Also, read an article about how to clear scratch disk.

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.

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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!

The Optimised Storage features of your Mac help you save storage space by storing your content in iCloud and making it available on demand:

• When storage space is needed, files, photos, films, email attachments and other files that you rarely use are stored in iCloud automatically.
• Each file stays exactly where you last saved it, and will be downloaded when you open it.
• Files that you’ve used recently remain on your Mac, along with optimised 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.

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Manage storage on your Mac

The Storage Management window offers recommendations for optimising 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 display 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 (optimised) 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 US$0.99 a month, and you can purchase additional storage directly from your Apple device. Find out more about prices in your region.

Optimise Storage

Click the Optimise button to save space by automatically removing films and TV shows you've watched. When storage space is needed, films or TV shows that you've purchased from Apple and have already watched will be removed from your Mac. Click the download icon next to a film or TV show to download it again.

Your Mac will also save space by only keeping 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.

Optimising storage for films, TV shows and email attachments doesn't require iCloud storage space.

Empty Bin Automatically

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Empty Bin Automatically permanently deletes files that have been in the Bin 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 Bin.

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.

Find out how to redownload apps, music, films, 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 Optimise Mac Storage setting on the right. To turn off iCloud Drive entirely, untick 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 Optimise Mac Storage settings.
• In Photos, choose Photos > Preferences, then click iCloud. Store in iCloud selects iCloud Photos and Optimise 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. Optimise Storage selects “Automatically delete watched films and TV shows'.
• If you're using macOS Mojave or earlier, open iTunes, choose iTunes > Preferences from the menu bar, then click Advanced. Optimise Storage selects “Automatically delete watched films and TV shows”.
• In Mail, choose Mail > Preferences from the menu bar, then click Accounts. In the Account Information section on the right, Optimise Storage sets the Download Attachments menu to either Recent or None.

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

Other ways that macOS helps automatically save space

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

• 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

Free Up Disc Space Macbook Air

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

• Music, films and other media can use a lot of storage space. Learn how to delete music, films and TV shows from your device.
• Delete other files that you no longer need by moving them to the Bin, then emptying the Bin. 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 mailbox, choose Mailbox > Erase Deleted Items.

Learn more

Free Up Space On Mac

• 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 may display storage categories, such as Not Mounted, VM, Recovery, Other Volumes, Other, 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 won'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 Optimise Mac Storage, learn how to make sure that your projects are always on your Mac and able to access their files.