

If you want your Mac to start up again from the volume you just you erased, select Reinstall macOS in the utilities window, then click Continue and follow the onscreen instructions.When done, quit Disk Utility to return to the utilities window.Optional: If you previously used Disk Utility to add internal volumes other than Macintosh HD, you can erase them individually using the same process.If this button isn't shown, click Erase instead. Format: APFS or Mac OS Extended (Journaled), as recommended by Disk Utility.Click the Erase button in the toolbar, then enter the requested details:.Alternative to the Target Disk mode, a bootable USB recovery drive can help access the affected Mac and recover all the stored data. Select Macintosh HD in the sidebar of Disk Utility. After the recovered files are saved, navigate to the save location to view the recovered files and folders.From the utilities window, select Disk Utility and click Continue.If asked, select a user you know the password for, then enter their administrator password.Start up from macOS Recovery: Turn on your Mac, then immediately press and hold these two keys until you see an Apple logo or other image: Command (⌘) and R. HowTo HowtoCleanMacHardDrive MacHardDriveMacs are powerful machines, but even they can be brought to their knees if you don’t manage your hard drive space.
