The startup disk is the hard drive where your computer's operating system and applications are installed. This is usually a hard drive that is physically inside your Mac. For more advanced users, I'd like to address some additional options you have with your startup disk.
Why does my Mac say startup disk?
Because there comes a day in the life of every Mac user when the message “Your startup disk is almost full” will hit you hard. ... So when the “Your startup disk is almost full” message pops up, it basically means you are running out of space on your primary disk drive and that is very bad news.
How do I clear my startup disk on a Mac?
How to free up space on your Mac startup disk
- Empty the Trash and Downloads folder. ...
- Get rid of Time Machine snapshots. ...
- Delete old iOS and iPadOS backups. ...
- Uninstall apps you don't use anymore. ...
- Upload or export your largest files. ...
- Find and remove duplicate files. ...
- Clean up unnecessary system files.
