How to Get More Disk Space on Mac: 12 Fixes

Running low on storage slows down your Mac and can prevent updates and app installs. This guide walks you through the quickest, safest ways to free up disk space—from clearing system caches to moving large files to external drives—without buying new hardware.

What You’ll Need

• About 15–30 minutes of time
• An external drive or cloud storage (optional, for moving files)
• Administrator access to your Mac (you’ll be asked for your password)

Step-by-Step

1. Check what’s eating your disk. Click the Apple menu → About This Mac → Storage. The bar shows categories like Applications, Documents, and System Data. Click Manage to open Apple’s built-in storage recommendations.
2. Empty the Trash. Right-click the Trash icon in the Dock and select Empty Trash. Files you deleted stay there until you do this—they still take up space. For a deeper clean, open Trash and check for large items before emptying.
3. Clear caches (safe method). Open Finder, press Cmd+Shift+G, type ~/Library/Caches, and press Return. Sort by Size (View → Show View Options → Size). Delete the contents of folders you recognize (e.g., browser caches), but don’t delete the folders themselves. Empty the Trash afterward.
4. Remove old iOS backups. If you back up an iPhone or iPad to this Mac, those files can be huge. Go to Finder → your device (under Locations) → Manage Backups. Delete old backups you no longer need. Or in System Settings → General → Storage, look for iOS Files.
5. Uninstall apps you don’t use. In Finder, go to Applications. Drag unused apps to the Trash. Right-click the Trash and Empty Trash. For apps with leftover support files, use a dedicated uninstaller if the app provided one, or search ~/Library/Application Support for the app’s name and delete those folders too.
6. Clean up Downloads and Documents. Open Finder → Downloads. Sort by Size (View → Sort By → Size). Move files you want to keep to an external drive or cloud storage, then delete the rest. Do the same for Documents—look for old PDFs, presentations, and disk images (.dmg files).
7. Use Storage Optimization tools. In System Settings → General → Storage → Manage, you’ll see options like:
   • Optimize Storage: Removes watched Apple TV movies and TV shows you’ve already seen.
   • Reduce Clutter: Opens a list of large files, downloads, and containers.
   • Empty Trash Automatically: Removes items from Trash after 30 days.
8. Move Photos to the cloud. Open Photos → Settings → iCloud → Photos. Enable iCloud Photos and choose “Optimize Mac Storage.” This keeps full-resolution versions in iCloud and smaller previews on your Mac. If you don’t use iCloud, export your library to an external drive and delete the local copy.
9. Delete language files (advanced). Some apps include many languages you never use. Use a tool like CleanMyMac X (paid) or do it manually: right-click an app in Applications → Show Package Contents → Contents → Resources, and delete .lproj folders for languages you don’t need. Be careful—this can break an app if you delete the wrong folder.
10. Compress large files. Right-click a big file or folder and select Compress. This creates a .zip that takes less space. Move the original to Trash and empty it. This works well for documents, not for already-compressed files like JPEGs or MP4s.
11. Reduce Time Machine snapshots. If you use Time Machine, local snapshots can pile up. Open Time Machine preferences and exclude folders you don’t need backed up. Or delete old backups: in Time Machine, enter the backup, select a date, and click the gear icon → Delete Backup.
12. Restart your Mac. A simple restart clears temporary files and system caches that macOS recreates on boot. It’s the easiest step and often frees a few gigabytes.

Common Mistakes

• Deleting system files you don’t understand. Avoid touching anything in /System or /Library unless you’re certain. You can break your Mac.
• Emptying the Trash before checking for needed files. Once emptied, files are gone—unless you have a backup. Always review before emptying.
• Using “CleanMyMac” style apps without knowing what they delete. They can remove essential caches or login items, causing slowdowns or app crashes.
• Ignoring the “Other” or “System Data” category. This often contains caches, logs, and virtual memory files. You can’t delete it all, but clearing caches helps.
• Deleting app support folders while the app is running. Quit the app first, then delete its support files.

Tips

• Use a disk space analyzer. Free tools like DaisyDisk or GrandPerspective visually show which folders take up the most space. They help you spot hidden large files.
• Move your Photos library to an external drive. If you have many photos, this can free up tens of gigabytes. Hold Option while opening Photos to select the new library location.
• Stream instead of downloading. For Apple TV, music, or podcasts, choose “Stream” rather than “Download” in the app settings.
• Regularly clean Downloads. Set a monthly reminder to sort and delete files you no longer need.
• Use iCloud Drive for Desktop & Documents. This offloads files to the cloud, but only if you have enough iCloud storage.

Troubleshooting

If you still see “Disk Full” after cleaning:

• Check for large hidden files: In Finder, press Cmd+Shift+G and go to /private/var/vm. The sleepimage file can be huge (same size as your RAM). If you don’t use Power Nap, you can disable it in System Settings → Battery, but you can’t delete sleepimage safely while the Mac is running.
• Reboot into Safe Mode (restart and hold Shift). This clears some system caches. After rebooting normally, check storage again.
• If “System Data” is still huge, it may be Time Machine local snapshots. Run tmutil listlocalsnapshots / in Terminal to see them. You can delete them with tmutil deletelocalsnapshots followed by the date, but only if you have a current backup.
• If the problem persists, check if you have a corrupted cache or a runaway log file. Open Console app, search for “error” and see if any app is writing logs constantly. Quit or uninstall that app.

Frequently Asked Questions

How much disk space should I keep free?

Apple recommends at least 10–15% of your total disk free. For a 256GB Mac, that’s about 25–40GB. Less than that can cause slowdowns and failed updates.

Is it safe to delete “Other” or “System Data”?

Partially. This category includes caches, logs, and virtual memory. You can safely clear caches (as shown above) and old logs, but you shouldn’t delete the entire folder. Use a disk analyzer to see what’s inside.

Will emptying the Trash permanently delete files?

Yes, unless you have a backup (like Time Machine). After emptying, the files are gone from your Mac, though recovery software might find traces.

Can I move apps to an external drive?

Yes, but not all apps support it. Apps downloaded from the App Store can be moved by dragging them to the external drive, but some will fail to launch. For non-App Store apps, check if the developer offers an option to install to a custom location. It’s often safer to reinstall on the external drive.

Why is my “Photos” library so large?

Photos stores full-resolution images and videos. If you have thousands of items, it can easily be 20–50GB. Using iCloud Photos with “Optimize Mac Storage” keeps only small previews on your Mac.

Do I need a third-party cleaner?

No. macOS has built-in tools that cover most needs. Third-party cleaners can be helpful for advanced users, but they’re not required and can sometimes cause issues. Start with the built-in options.

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