Move files to an external storage device.Delete other files that you no longer need by moving them to the Trash, then emptying the Trash.Music, movies, and other media can use a lot of storage space.This is usually a hard drive that is physically inside your Mac. The startup disk is the hard drive where your computer’s operating system and applications are installed. This should boot the Mac into Recovery Mode. Hold down Option/Alt-Command-R or Shift-Option/Alt-Command-R to force your Mac to boot into macOS Recovery Mode over the internet. Here you can open up each folder and delete unneeded cache files by dragging them to the Trash and then emptying it.Your system, or library, caches will appear.Type in ~/Library/Caches/ and then click Go. Erase your startup disk and reinstall macOS.Access your data using Target Disk Mode.Repair your startup disk using Disk Utility.Bypass the Trash when you delete files.These tips also work if your Mac won’t turn on because the startup disk is full. Intel processor: Turn on your Mac, then immediately press and hold Command (⌘) and R keys until you see an Apple logo or other image.Ĭan’t do anything on Mac because disk is full?.Apple silicon: Turn on your Mac and continue to press and hold the power button until you see the startup options window.Repair Startup Disk in macOS Recovery Mode How do I fix my Mac when it says no startup disk?
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