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Mac os disk utility master boot record greyed out mac os#
Mac os disk utility master boot record greyed out install#

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.

I tried making a macos installer usb and plugging it in to the pc to get to disk utility.

Mac os disk utility master boot record greyed out mac os#

Click the Erase button (MAKE SURE YOU DO HAVE BACKUP) Format: Choose Mac OS Extended (Journaled) Scheme: Choose GUID Partition Map. Im not sure what happened, but my macOS hard drive doesnt show on boot. Select Disk Utility from the utilities window of macOS Recovery, then click Continue.

In this example, the last volume on the disk is Macintosh HD - Data.Ĭlick Run to begin checking the selected volume for errors. I had everything running well, I switched motherboards to a Designare and was working well.

Mac os disk utility master boot record greyed out install#

I booted from my home-made Lion install thumb drive and Disk Utility appears to be functional from there.

The only thing I can do is view disks and partitions, I can't even eject a removable disk (eject still works from Finder though). For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab. Same here, disk utility is almost totally non-functional.