

That is to say, your startup disk contains the operating system information, applications and user data. What is the startup disk?īy default, your Mac starts up from its built-in hard disk, but a startup disk can be any storage device that contains an operating system compatible with your Mac. If you’ve already known something about this, you can skip to the second part: ways to fix full startup disk. This part is about the information on the full startup disk warning. Clean up your Mac securely and automatically 1. Then expand them when you need to use them again.ĭid you empty the Trash? When you move a file to the Trash, its storage space doesn't become available until you empty the Trash.If you’re a fan of Mac Pro/Air, you won’t be unfamiliar with the warning message: Your Startup Disk Is Almost Full.Īnd if you’re getting this full startup disk warning, don’t panic! This is a common error on Mac and you can fix the startup disk full error message easily.Ģ. If you don't want to delete certain files, you might be able to save space by compressing them. Check the Users folder on Macintosh HD for any shared files that you no longer need to share.If your Mac is set up for multiple users, delete users that no longer need access to your Mac. Or ask them to follow the steps in this article after logging in to their user account. Also check the Users folder on Macintosh HD for any undeleted data belonging to deleted users.If you use your Mac to back up your iPhone or iPad, you can delete old backups.

Also choose Mailbox > Erase Deleted Items.

