What's worse, there's no additional information provided to solve the issue.
It still can fail to fix disk issues accompanied with some error messages, such as "couldn't Unmount Disk" or "erase process has failed." This error generally results from improper modification of the boot drive, such as partitioning, disk verification, or repairing or formatting. When this error pops up, not only will the Disk Utility halt suddenly, but the disk will suffer as well, such as damaged data on this disk.
Methods to fix "couldn't unmount disk" error Therefore, it is imperative to resolve this error as soon as possible.
If "Couldn't Unmount Disk" or "erase process has failed" error occurs, the simplest solution is to boot the Mac system and run Disk Utility on the disk. By this means, you can make use of USB boot drive. First off, insert the USB boot drive to Mac and reboot. Then, during booting, you should hold down the "Option" key button to select the attached boot drive. Next, in the boot menu, select "Disk Utility." 4. After that, go to "First Aid" and verify the disk. Lastly, perform the original task on the original disk. If the error message appears during "First Aid" or formatting a non-boot disk, the above means will not make effects surely. At this point, you can try solving it with Recovery Partition. Then, when booting, hold down the "Option" key to select Recovery Partition. Next, access Disk Utility from the boot menu. Lastly, select "First Aid" to re-verify the disk or choose "Erase" to format the disk at your will. Moreover, you can also attempt to eradicate this error, forcing unmounting disk by command line. To begin with, you have to access the Terminal application. Then, input the "diskutil list" line, which will list out all the disks on the Mac. At this time, you ought to find out the disk that you want to force unmount. Lastly, you should type "sudo diskutil unmountDisk force /dev/disk" line.
Replace the "/dev/disk" with the correct disk number, such as "/dev/disk1". Steps to recover data from an unmounted drive on Macĭownload and Install Data Recovery for Mac software If you found your drive in unmounted condition on Mac and urgently need to recover the data, then recover them as below steps. I recommend you to use Bitwar Data Recovery for Mac to recover your lost data from your drive. #Volume could not be unmounted imac pro for mac #Volume could not be unmounted imac pro for windows 10.#Volume could not be unmounted imac pro full version.#Volume could not be unmounted imac pro for mac.#Volume could not be unmounted imac pro how to.#Volume could not be unmounted imac pro for free.
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