10/8/2021

Mac Usb Unable To Unmount Volume For Repair

62
  • Holding the Option key when restarting the macbook, and enter the Recovery HD, selecting the Disk Utility. Click the hard disk name, and select Erase tab. Click the Erase button, a message displayed: Disk Erase failed. Disk Erase failed with the error:Couldn't unmount disk.
  • Unmount the EFI partition! Also unmount WINDOWS partition if you can see it from Mac! Run the Install macOS Sierra from Apps. Restart your PC. Press space while hovering over Install macOS Sierra from Mac HDD, or something similar. Use ONLY 'without caches', at first. Give it a few minutes, install should start.
  • Ive heard some people can get a volume to mount from TechTool that Disk Utility wont. What happens if you boot up WITHOUT the external drive connected, then open Disk Utility, THEN connect the drive and try to repair it.

Upon finition, smartly unmount OS X Base System disk under 'Disk Images' in Disk Utility. Open the USB drive (the name 'USB' will become 'OS X Base System', that's why you need to smartly unmount the other one using Disk Utility to avoid confusion.) Inside the USB drive, go to 'System' then 'Installation' remove the file named 'Packages'. That's actually an allias (or a shortcut if you want).

Greetings eleanorfromhilton,
Mac Usb Unable To Unmount Volume For Repair

Mac Usb Unable To Unmount Volume For Repair Mac

Mac Usb Unable To Unmount Volume For RepairThank you for using Apple Support Communities. It seems like you want to repair your external drive but it is giving you an error that it is not able to unmount and repair. I would recommend you read this article and use it to help troubleshoot the issue.

Mac Usb Unable To Unmount Volume For Repair Parts



If you try to verify a volume that is not your startup disk but for some reason Disk Utility can't unmount the volume (for example, the disk may have open files), the verification will appear to start but then stop without displaying any alert message. If you look in the Console (/Applications/Utilities/), you will see an entry like this:

Verifying volume “Storage” The disk “Storage” could not be unmounted Could not unmount disk for verification, attempting live verify

If you try to repair a disk that cannot be unmounted, the repair will appear to start, but then stop as Disk Utility displays this message: 'Repairing disk failed with error. Could not unmount disk.'

If you look in the Console (/Applications/Utilities/), you will see an entry like this:

Verify and Repair disk 'Storage.' The disk “Storage” could not be unmounted. Could not unmount disk for verification. Repairing disk failed with error. Could not unmount disk.

In some rare situations, your computer might not respond for several seconds.

If you cannot determine which files are open on the disk that you want to verify or repair, restart your computer and then mount the disk again, or start up from your Mac OS X Install DVD or CD to repair.

Mac Usb Unable To Unmount Volume For Repair Cost

Using Disk Utility to verify or repair disks
Take care.

Mac Usb Unable To Unmount Volume For Repair Disk

Jan 31, 2017 1:38 PM