You need to click on the 'Run' option to move forward in the process.Īfter you 'Run' the First Aid option as shown in the above screen, it will show you the progress and show 'Operation Successful' on the completion. You have to click on the 'Done' button once the operation is successful as shown in the below image. You can start performing the tasks which were halted due to the error. When the first aid could not unmount the volume for repair, try using the 'Use the terminal application' method to unmount the disk volume.

Terminal application allows you to control your Mac operations via the command prompt. MAC PARTITION FAILED CANNOT UNMOUNT DISK MAC To access the terminal application (command prompt), here are the steps to be followed: Command-line can be used to eradicate 'Can't unmount disk' from Mac. Step 1: Open the 'Terminal Application' from the 'Utilities' menu. Step 2: Then, type 'diskutil list' on the command prompt to get the list of all the disks on Mac. MAC PARTITION FAILED CANNOT UNMOUNT DISK MACįor example, the syntax of the disk may be '/dev/diskx' Step 3: Now, search for the disk you want to force unmount.

MAC PARTITION FAILED CANNOT UNMOUNT DISK SOFTWARE.

Verify disk could not unmount disk