#Mac os disk utility cannot unmount disk how to#
#Mac os disk utility cannot unmount disk mac os#

I can even unmount every partition on a disk with diskutil unmount disk5s2, etc., but the attempt to run diskutil unmountDisk disk5 still fails with the same error message. I don't know why this would matter, but perhaps it does.Īlso, diskutil unmount works on the individual partitions.

#Mac os disk utility cannot unmount disk mac os#

: (-69673) Im using Mac OS Monterey 12.3.1 and a Western Digital My Passport Ultra for Mac. This backup is from a different computer (not the one I am running these commands on). Disk Utility First Aid: Unable to unmount volume for repair. Refresh the page, check Medium ’s site status, or find.

#Mac os disk utility cannot unmount disk how to#

One thing that both of the disks in question have in common is that one of their partitions is a Time Machine backup. How to Delete and Merge Partitions on Mac Hard Drive by Kepler Donald Medium 500 Apologies, but something went wrong on our end. And even the disks that give an error can be ejected in Finder as usual (no need to force-eject or anything). It is only for certain disks that diskutil unmountDisk gives this error other disks unmount just fine. However, running lsof prints nothing, regardless of the arguments I give it, e.g., > lsof /dev/disk5 In the sidebar, select the disk you want to repair. Click on Disk Utility, and then Continue. Press and hold the Command and R keys until the Apple logo appears during the restarting time. I expect to see this error when some process is using the disk (hence my previous question). To scan a disk, follow below mentioned steps: Tap on Apple logo from your Mac. Since getting a new Macbook Pro and updating to Monterey, running diskutil unmountDisk on two of these HDs fails with an error message of form Unmount of disk5 failed: at least one volume could not be unmounted. As the hard drive becomes inaccessible, except the erase button, all other operations become disabled or are greyed out. I will use Disk Utility from the Recovery HD volume to do this since both source and destination volumes in the cloning process will need to be unmounted. If you are unable to view the Macintosh hard drive in disk utility, here the disk is not mounted. I can accomplish this by cloning the 500GB drive to the 1TB drive. I have a number of external hard drives with multiple partitions each. The Problem: I need to upgrade the SSD to 1TB.