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PARTITION FAILED COULD NOT UNMOUNT DISK FOR MAC
PARTITION FAILED COULD NOT UNMOUNT DISK MAC OS
PARTITION FAILED COULD NOT UNMOUNT DISK DRIVER
PARTITION FAILED COULD NOT UNMOUNT DISK FULL

Launch Disk Utility after your Mac has restarted and try whatever you were trying to do again.

Restart your Mac after quitting System Preferences.

Choose the disk that you just connected.

Enter your admin username and password by clicking the padlock.

Select System Preferences from the Apple menu.

Insert a disk containing a bootable installation of macOS.

The couldn’t unmount disk external hard drive mac error on older Macs that don’t have a T2 security chip: If this solution doesn’t work, try the next one. “/dev/diskx” should be replaced with the correct disc number, such as “/dev/disk1.”

Finally, type “ sudo diskutil unmountDisk force /dev/diskx” on the command line.

You should now locate the disc that you want to unmount forcefully.

After that, type “ diskutil list” to get a list of all the discs on the Mac.

To begin, you must open the Terminal application.

PARTITION FAILED COULD NOT UNMOUNT DISK MAC OS

You can also try to fix the couldn’t unmount disk mac OS problem by using the command line to force the disc to be unmounted. You May Also Read: 8 Solutions To Fix Macintosh HD Not Mounted The right way to fix the issue is to use a separate USB device. If the disc causing the issue is the same as the primary boot partition, this will not work.

For disc formatting, “ Erase” is employed.

The Disk Utility is selected from the Boot Menu Verification, and the disc is repaired using the “ First Aid” option.

The Mac is restarted while holding down the OPTION key, and the Recovery Partition is selected.

The solution is then found in the prior approach. This does not apply to the use of partitions or formatting to change the boot disk’s configuration. In this situation, the problem is solved using the Recovery Partition, which is included with all subsequent versions of Mac OS X. The above issue can also occur when doing first aid or formatting a non-boot partition. Method 2: Fix Couldn’t Unmount Disk Mac Issue Using The Recovery Partition

Finally, on the original disc, complete the original task.

Then go to “ First Aid” and double-check the disc.

Select “ Disk Utility” from the boot menu.

Then, in the meantime when the computer is booting, hold down the “ Option” key to select the associated boot disc.

To begin, connect the USB boot drive to your Mac and restart it.

You can use a USB boot device in this manner. If the disc to be edited is the boot drive, the most straightforward way is to boot the Mac system from another drive and then run Disk Utility on the disc. Method 1: Resolve The Issue By Using A USB Boot Drive.

Resolve The Issue By Using A USB Boot Drive.

Let’s move on to troubleshoot this issue:

PARTITION FAILED COULD NOT UNMOUNT DISK FULL

There is the risk of losing data, and the only way to protect your data is to create a full backup. You should backup disk data before attempting to fix can’t unmount disk mac terminal problem with the help of the below solutions.

Virus and malware sneak into the Mac drive.Īs you have known the common causes, now it’s time to deal with the above-mentioned error by applying some quick fixes.

PARTITION FAILED COULD NOT UNMOUNT DISK DRIVER

If the driver is used by other applications or processes.

There are numerous reasons that can trigger the ‘ failed to unmount because it is currently in use’ issue.īut below I have shortlisted the three major factors behind the occurrence of this problem. Essentially, your Mac’s erase process has failed. If you get an error message saying can’t unmount disk mac terminal, it usually means a process on your Mac is attempting to modify your boot disk but is unable to do so because macOS won’t allow the disk from which it booted to be unmounted.įor example, you won’t be able to erase or partition your boot disk in Disk Utility because macOS will not unmount the disk. What Does It Imply When It Says “Couldn’t Unmount Disk Mac OS”? * Free version of the program only scans and previews recoverable objects.

PARTITION FAILED COULD NOT UNMOUNT DISK FOR MAC

In addition, here you will also get the best Hard Drive Recovery Tool for Mac to recover deleted data after solving couldn’t unmount disk mac OS error.