Forum Discussion

Asaoniu's avatar
Asaoniu
Brass Contributor
May 06, 2026

How to free or clear system data on Mac as it takes too much space

I'm going crazy here. My MacBook Pro storage is almost full, and when I check the storage breakdown, this mysterious thing called System Data is eating up over 100GB. That's insane! I've already empt...
GriffinOakmont's avatar
GriffinOakmont
Iron Contributor
May 06, 2026

System and app cache files help macOS and applications load faster, but over time they can grow very large and take up tens of gigabytes of storage. Old browser caches, app temporary files, and outdated system cache data are common reasons why the “System Data” category becomes huge on a Mac. Removing unnecessary cache files is generally safe and can quickly free up storage space, especially on older MacBooks with limited SSD capacity.

How to clear out system data on macbook air

1. Open Finder.

2. Click Go in the top menu bar.

3. Select Go to Folder.

4. Enter the following path:

~/Library/Caches

4. Open folders inside and delete unnecessary cache files from apps you recognize.

5. Move the deleted files to the Trash.

6. Repeat the process for system-level caches by opening:

/Library/Caches

7. Restart the Mac after cleanup so macOS can rebuild fresh cache files safely.

Important Tips

  • Do not delete entire system folders unless you know what they do.
  • Browser caches from Safari, Chrome, and Firefox are usually safe to remove.
  • Some apps may load slightly slower the first time after cache cleanup because new cache files need to be rebuilt.
  • Closing apps before deleting their cache folders helps avoid errors.