Forum Discussion
Asaoniu
May 06, 2026Brass Contributor
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...
Yosefor
May 07, 2026Copper Contributor
Safe Boot is a built-in macOS startup mode that automatically performs system maintenance, including clearing system data on Mac.
How to do it:
1. Shut down your Mac completely
2. Turn it on and immediately press and hold the Shift key
3. Release the Shift key when you see the login window
4. Log in normally (you may need to log in twice)
5. Restart your Mac normally (don't hold any keys)
What it does for clear system data on Mac:
* Automatically clears system cache files
* Verifies your startup disk
* Deletes temporary files and some system logs