You may need to create an image file of your startup disk. Keep holding the buttons until you see the Options window or a macOS Recovery screen. To do this, press and hold the Power button for an M1 Macs or press and hold Cmd + R while booting up for older Macs with an Intel processor. If your Mac won’t boot, you should open Disk Utility through Recovery Mode. If any problems arise, you can select the volume or disk you want to repair, then click First Aid.
Disk Utility is a built-in tool for inspecting file systems, mounting or unmounting volumes, formatting drives, and fixing other problems.ĭuring startup, your Mac performs a consistency check of the partition scheme and volume directory structure.
