How to Free Up Storage Space on a Mac

The fastest way to free up storage on a Mac is to remove large files you no longer need, empty the Trash, delete old downloads, uninstall unused apps, and review macOS storage recommendations. If your Mac storage is full, work through the steps below in order. Start with the built-in tools before deleting caches or using Terminal.

Quick Answer

1. Open the Apple menu and choose System Settings.
2. Select General, then Storage.
3. Review the recommendations and the categories using the most space.
4. Delete large, unnecessary files from Downloads, Movies, and other folders.
5. Uninstall apps you no longer use.
6. Remove old iPhone or iPad backups if you no longer need them.
7. Empty the Trash.
8. Restart your Mac and check storage again.

You can also use Finder to locate large files, but avoid deleting files from system folders unless you know exactly what they do.

Check What Is Using Storage

Before deleting anything, check how your Mac’s storage is being used. This helps you focus on the categories that will free up the most space.

1. Open the Apple menu.
2. Choose System Settings.
3. Select General in the sidebar.
4. Click Storage.

You’ll see categories such as Applications, Documents, iCloud Drive, Mail, Messages, Photos, macOS, and System Data. The exact categories and amounts can vary.

Older versions of macOS may show storage details by choosing About This Mac from the Apple menu and selecting Storage. The names and layout may differ depending on your Mac.

What System Data means

System Data is a broad storage category. It can include caches, logs, temporary files, local Time Machine snapshots, virtual memory files, application support files, and other data that does not fit neatly into another category.

A large System Data amount does not always indicate a problem. macOS may temporarily classify files there and recalculate the total later. Do not delete random files from system folders just to reduce this category.

Use macOS Storage Recommendations

The Storage settings may display recommendations designed to help you manage space. Available recommendations can vary by Mac and configuration.

Review each recommendation carefully before accepting it. Some actions can remove files automatically or change how files are stored.

Common recommendations may include:

• Store in iCloud: Moves or keeps certain files in iCloud when space is needed. This requires enough available iCloud storage and may make some files dependent on an internet connection.
• Optimize Storage: Removes watched Apple TV content and keeps only recent email attachments when appropriate. You can download content again later, but verify that this behavior suits you.
• Empty Trash Automatically: Removes items that have remained in the Trash for a specified period. Deleted items may not be recoverable afterward.
• Reduce Clutter: Helps identify large files, downloads, unsupported apps, and other items that may be safe to remove.

If you use iCloud, remember that deleting a file from an iCloud-synced folder can delete it from your other devices as well.

Delete Large and Unneeded Files

Large files are often the quickest way to free up storage on a Mac. Personal videos, disk images, exported projects, old installers, and archived downloads can consume many gigabytes.

Find large files with Storage settings

1. Open System Settings.
2. Choose General.
3. Select Storage.
4. Click the information button or category related to Documents, if shown.
5. Review large files, downloads, and unsupported apps.
6. Select files you no longer need and choose Delete.

Read the description of each item before deleting it. If you are unsure, move the file to an external drive instead of deleting it permanently.

Find large files with Finder

1. Open Finder.
2. Select a location, such as Macintosh HD or your home folder.
3. Choose File > New Smart Folder.
4. Click the + button near the upper-right corner.
5. Set a search condition, such as Kind, File Size, or Other.
6. Set a size threshold, such as files larger than 1 GB.
7. Review the results and delete only files you recognize.

You can also open your Downloads, Movies, Pictures, and Documents folders and switch to list view. Click the Size column to sort files by size. If the column is not visible, Control-click a column heading and enable Size.

Check your Downloads folder

The Downloads folder commonly contains old installers, duplicate attachments, compressed archives, and files downloaded only once.

1. Open Finder.
2. Select Downloads in the sidebar.
3. Sort the contents by Size or Date Modified.
4. Delete files you no longer need.
5. Control-click the Trash in the Dock and choose Empty Trash.

Do not delete an installer until you have confirmed that the related app is already installed and working. Some downloaded files may also be needed for an offline installation.

Remove Duplicate Files Carefully

Duplicate photos, videos, documents, and downloads can use substantial storage. However, macOS does not provide a universal duplicate-file cleanup tool for every folder, so review duplicates manually or use a reputable duplicate-finding app.

Before deleting a duplicate:

• Compare the file names, sizes, and modification dates.
• Open both files when their contents are important.
• Check whether one is stored in iCloud Drive or another synced service.
• Keep the highest-quality version.
• Make a backup before removing irreplaceable files.

Photos require extra care. The Photos app may already manage multiple versions, edits, and optimized copies. Avoid deleting files directly from the Photos Library package in Finder. To remove photos safely, open Photos, select unwanted items, choose Image > Delete [number] Photos, and then remove them from Recently Deleted if you are certain you do not need them.

Deleting items from Recently Deleted is permanent or may make recovery difficult. Confirm that you have a backup first.

Uninstall Apps You No Longer Use

Applications can include large support files, games, creative tools, and developer software. Removing an app can free space, but simply dragging an app to the Trash may leave related data behind.

Remove apps through Storage settings

1. Open System Settings.
2. Choose General > Storage.
3. Select Applications.
4. Review the list by size.
5. Select an app you no longer need.
6. Click the delete button and confirm.

Remove an app with Finder

1. Open Finder.
2. Select Applications.
3. Drag the unwanted app to the Trash, or Control-click it and choose Move to Trash.
4. Empty the Trash after verifying that you do not need the app.

Quit the app before removing it. If it is open, macOS may prevent deletion or leave related processes running.

Some apps include their own uninstallers. If an app has an Uninstall utility or an uninstall option in its installer, use that method and follow its instructions.

Do not remove apps that you do not recognize simply because they are large. They may be required by hardware, security software, work tools, or another application.

Delete Old iPhone and iPad Backups

Local device backups can occupy a significant amount of space.

1. Connect the iPhone or iPad to your Mac if the backup is stored locally and you need to identify the device.
2. Open Finder.
3. Select the device in the Finder sidebar.
4. Select the General tab.
5. Click Manage Backups.
6. Review the backups and delete old ones you no longer need.

Deleting a backup removes that local restore option. Keep a recent backup if you may need to restore the device.

You can also review backup-related storage through System Settings > General > Storage when the relevant category is available.

Clean Up Messages and Mail Attachments

Large attachments in Messages and Mail can remain on your Mac even after you no longer need them.

Messages

1. Open Messages.
2. Open a conversation.
3. Click the person or group name at the top.
4. Review the attachments and remove large items you no longer need.

Deleting a message or attachment may affect devices that use the same synced Messages account. Confirm that you do not need the item elsewhere.

Mail

Mail attachments may be stored locally for offline access. Deleting a message from Mail can remove it from the mail account if the account uses IMAP or another synchronized service.

Before deleting messages, check whether you need them for records, work, taxes, or legal purposes. Use mailbox cleanup tools provided by your email service when appropriate.

Review Photos, Music, and Video Libraries

Media libraries can be the largest category on many Macs.

Photos

Open Photos and review videos, screenshots, duplicates, and the Recently Deleted album. Large videos often provide more savings than individual photos.

If you use iCloud Photos, enabling optimized storage can reduce the amount of full-resolution media kept locally, but the original files remain in iCloud and require available iCloud storage. Make sure important photos are backed up before changing storage settings.

Music and podcasts

In the Music or Podcasts app, remove downloaded items you no longer need. Streaming services may allow you to download them again, but removing downloads can make them unavailable offline.

Apple TV and other video apps

Delete downloaded movies and shows from the app that downloaded them. Avoid deleting app library files directly in Finder, because doing so can damage the library or remove content unexpectedly.

Clear Caches and Temporary Files Safely

Caches are temporary files that help apps load faster. They can grow over time, but deleting them is not usually the first or safest way to free up space. Apps and macOS will recreate many caches, so the storage savings may be temporary.

If you need to clear a user cache:

1. Save your work and quit open apps.
2. Open Finder.
3. Choose Go > Go to Folder.
4. Enter:

~/Library/Caches

5. Open the folder for a specific app.
6. Delete only cache contents you recognize, not the entire Library folder.
7. Empty the Trash if you are sure the files are safe to remove.
8. Restart the affected app.

Deleting cache files can sign you out of apps, remove temporary data, or cause an app to rebuild its cache. Never delete files from a cache folder while the related app is running.

Avoid deleting items from /System, /private, or other protected folders unless you have specific technical knowledge and a current backup. Manual system cleanup can cause errors or prevent software from working correctly.

Reduce Local Time Machine Snapshot Storage

Time Machine may create local snapshots when your backup disk is unavailable. macOS normally manages these snapshots, and they can be removed automatically when space is needed.

If storage remains unusually low, connect the Mac to its Time Machine backup disk and allow a backup to complete. This may help macOS manage local snapshot data.

Do not disable backups just to gain storage. A backup protects your files if you accidentally delete something or your Mac fails.

Advanced users can inspect local snapshots in Terminal, but deleting them manually is not recommended unless you understand the consequences. Storage displayed as System Data may also change after a restart or after macOS finishes indexing.

Empty the Trash

Files moved to the Trash still use storage until the Trash is emptied.

1. Review the Trash in the Dock.
2. Restore anything you may still need.
3. Control-click the Trash.
4. Choose Empty Trash.
5. Confirm the deletion.

This permanently removes the items from their original locations. Do not empty the Trash until you are certain that you will not need the files.

Unsafe Cleanup Methods to Avoid

Some cleanup methods can cause data loss or system problems:

• Do not delete random files from /System, /Library, or /private.
• Do not remove files from an app’s package or library bundle unless the developer’s instructions specifically say to do so.
• Do not use a “cleaner” app that requests broad access without understanding what it will remove.
• Do not delete iCloud files without checking whether they are synchronized to other devices.
• Do not remove Photos Library contents directly in Finder.
• Do not delete Time Machine backups or snapshots casually.
• Do not run Terminal cleanup commands copied from an untrusted website.
• Do not empty the Trash before checking its contents.
• Do not remove files while an app is open or while unsaved work may exist.

Always keep a current backup before performing major cleanup.

Troubleshooting

Storage does not decrease after deleting files

Empty the Trash, restart the Mac, and wait for storage calculations to update. If you use cloud storage, the system may need time to synchronize or reindex files.

System Data is still large

System Data can include temporary files, caches, snapshots, logs, and application support data. Check for large device backups, old installers, virtual machines, media libraries, and professional-app project files. Avoid deleting system files manually.

If the amount changes significantly after a restart, the earlier number may have included temporary or inaccurately categorized data.

An app will not delete

Quit the app and try again. If it starts automatically, close it from the menu bar or restart the Mac. Some apps require their own uninstallers.

You deleted an important file

Check the Trash first. If it is not there, restore it from Time Machine or another backup. If the file was stored in iCloud Drive or another synced service, check its recently deleted or recovery area.

The Mac is too full to start or update

Start by removing large files from Downloads, Movies, and other personal folders. If necessary, move files to an external drive. Do not delete system files to make room for an update.

Frequently Asked Questions

How do I free up storage on a Mac quickly?

Delete large videos, old downloads, unused apps, and local device backups. Then empty the Trash. These areas are generally safer and more effective to review than system folders.

Why is my Mac storage full when I cannot find large files?

Storage may be used by System Data, local Time Machine snapshots, caches, application support files, virtual machines, mail attachments, or hidden library data. Use System Settings > General > Storage and allow time for macOS to recalculate the categories.

Is it safe to delete Mac cache files?

Some user cache files can be deleted, but the benefit may be temporary. Apps may rebuild them, and deleting caches can remove temporary data or sign you out. Do not delete system files simply because they appear in a cache-related folder.

How can I reduce System Data in macOS?

Start by restarting the Mac, completing a Time Machine backup, removing old device backups, deleting unused app data and large files, and allowing storage calculations to update. Avoid aggressive manual deletion from protected folders.

Does emptying the Trash permanently delete files?

Yes. Emptying the Trash removes the files from their original locations. Recovering them may require Time Machine, cloud recovery, or specialized recovery software.

Should I use a Mac cleaner app?

You do not need a cleaner app for routine cleanup. Built-in macOS tools are usually sufficient for reviewing storage, deleting files, and uninstalling apps. If you use a third-party utility, research it carefully and review every deletion before confirming.

Final Thoughts

To free up storage on a Mac safely, begin with System Settings > General > Storage and concentrate on large personal files, downloads, unused applications, media, and old backups. Empty the Trash only after checking its contents, and treat System Data and cache folders cautiously. A regular backup and occasional storage review can help prevent your Mac from becoming full again.