
Step3: Now, search for the disk you want to force unmount.

Step2: Then, type “diskutil list” to get the list of all the disks on Mac. Step1: Access the “Terminal Application”.
UNMOUNT DISK OSX MAC
The error message “Can’t unmount disk” can also be eradicated from Mac using the command line.

This method will not work if the disk which is throwing this error and the primary boot partition is the same. Step3: From the Boot menu select “Disk Utility” and go to “First Aid” to verify and repair the disk or go to “Erase” if you wish to format the disk. Step2: Then, choose “Recovery Partition” option from the Boot menu. Step1: Reboot your device (Mac) and hold the “Option” key while booting. This method can be beneficial when the disk error occurs while formatting a non-booted partitioning or by First Aid. Solution 2: Fix using a Recovery Partition These steps should eliminate the issue, but if this method fails to do so then opt for the following method. Step4: Go to option “First Aid”, verify the disk and start repairing the drive if required.Īs you can see a boot drive is essential in this case. (If you are using Installer disk, then go to the “Utilities” menu and click on “Disk Utility” option). Step3: After this step, from the Boot menu access Disk Utility. Step2: Now, when the boot process holds the “Option” key, select the option “attached boot drive” from the utility menu. Step1: Be sure that the USB Drive is connected to your Mac device and then start to reboot the system. If the Boot drive was not there, then the error would have remained unresolved. It is the most common solution to fix the error with the support of Boot drive. Solution 1: Fix the error “Can’t unmount disk mac” using the USB Boot drive
UNMOUNT DISK OSX HOW TO
How to fix “Couldn’t unmount disk Error on Mac”įollowing are some of the solutions that can help to fix the error message “Couldn’t unmount disk on Mac”.
UNMOUNT DISK OSX SOFTWARE
Recover Data on Mac using Bitwar Data Recovery Software.Solution 2: Fix using a Recovery Partition.Solution 1: Fix the error “Can’t unmount disk mac” using the USB Boot drive.How to fix “Couldn’t unmount disk Error on Mac”.What Causes the Error “Can’t unmount disk Mac”.And I can't erase the drive to get a brand new drive to work with. I backed up my startup drive to this drive so I could wipe and reinstall OSX on my new SU drive but now I can't delete items off the backup drive because the message says I can't delete backup items. I have backed it up and using DU tried to erase it = by both highlighting the drive identifier and the name - in both cases, whether I try to erase disk or set it to erase to one partition, I get a message saying it can't do it because it can't unmount the disk. I have a MacPro and 4 drives inside it, one of which I need/want to erase.
