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If you check your startup volume (Macintosh HD), make sure you also check your data volume (Macintosh HD - Data). Note: If you're checking your startup disk or startup volume, restart your computer in macOS Recovery, select Disk Utility in the macOS Utilities window, then click Continue.
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In the Disk Utility app on your Mac, choose View > Show All Devices.
#MAC OS DISK UTILITY ERASE GREYED OUT PRO#
Whether I'm working on my Mac mini at the start of my day in my office or changing to my back deck using my MacBook Pro in the afternoon, macOS's features allow it to happen since all of my files are accessible to me via iCloud. I love my Mac environment, from using macOS to continuity, to iCloud, it allows for me to be able to have a flexible workflow. I shut that computer down, to move disk to a different computer and suddenly it stopped mounting. Oddly, it was just mounted on a different computer. DU says to repair disk and then try mounting again. If you run First Aid on a volume, Disk Utility verifies all the contents of that volume only. If you run First Aid on a disk, Disk Utility checks the partition maps on the disk and performs some additional checks, and then checks each volume. Disk Utility can't detect or repair all problems that a disk may have. Disk Utility can fix certain disk problems-for example, multiple apps quit unexpectedly, a file is corrupted, an external device doesn't work properly, or your computer won't start up.