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If you used Disk Utility from macOS Recovery, you can now restart your Mac: choose Apple menu  > Restart. The order of repair in this example was Macintosh HD - Data, then Macintosh HD, then Container disk4, then APPLE SSD. Keep moving up the list, running First Aid for each volume on the disk, then each container on the disk, then finally the disk itself. If you're asked for a password to unlock the disk, enter your administrator password.Īfter Disk Utility is done checking the volume, select the next item above it in the sidebar, then run First Aid again.If the button is dimmed and you can't click it, skip this step for the disk, container, or volume you selected.If there is no Run button, click the Repair Disk button instead.

b) Click on Erase to format the new hard disk. In this example, the last volume on the disk is Macintosh HD - Data.Ĭlick Run to begin checking the selected volume for errors. a) Startup your Mac and press the Option+ + R keys to boot into Recovery. You can also open a Finder window, select Applications in the sidebar, and head to Utilities > Disk Utility. Press Command+Space to open the Spotlight search dialog, type Disk Utility, and press Enter to launch the app. For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab. To format a drive on a Mac, you’ll need the built-in Disk Utility application.