Steps to clean up the startup disk on Mac. What to do if the startup disk is full on Mac?Ĥ. How does “Startup Disk Full” affect your Mac?ģ. So based on 10+ years experience in safely cleaning Mac from junk files, we’ve decided to write a comprehensive guide about Mac startup disk.Ģ. Our support team at Nektony got many emails from the users asking how to fix the full startup disk error. When the message “Your startup disk is almost full” appears on a Mac, most users get lost. Since macOS Big Sur, the warning message about running low on disk space looks like that: Here is the message the users get on a Mac when the startup disk is full: To resolve this issue, you need to free up some disk space. This is often due to having too many files occupying your Mac’s hard drive, bringing free space to a dangerously low level.

The warning message indicating that your startup disk is almost full appears when there is no longer enough free space on your disk. 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.What does “Your startup disk is almost full” mean? 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. If you use the Mail app for your email, choose Mailbox > Erase Junk Mail from the menu bar in Mail.Delete files in your Downloads folder. Open this folder from the Dock, or by choosing Go > Downloads from the menu bar in the Finder.

Delete music, movies, podcasts, or other media, especially if it's media that you can stream or download again as needed.You can also delete files that you no longer need. If you have another storage device, such as an external drive connected to your Mac, you can move files to that device. Media files such as photos and videos can use a lot of storage space, so you can take steps such as these:

Startup disk almost full macbook air