Using Disk Utility, I can mount and unmount the X5 and T7. Then I tried a few things in an attempt to isolate the problem or at least find some clues. (Yes, this erased all my backups, but I was willing to pay that price.) That didn't solve the issue either.
#Mac os x could not unmount disk mac os#
Next, I reformatted the X5 from Mac OS Extended to APFS. None of the advice in that document solved the issue. I carefully followed Samsung's Troubleshooting Guide for macOS (Revision 1.1, 2021).
#Mac os x could not unmount disk update#
This is not an acceptable workaround.įirst, I tried to update the Samsung software, thinking that maybe my older version was incompatible with Monterey.
Then I can plug the X5 in and it will mount normally. To recover, I need to shut down and restart the MacBook. Instead, it just gets hot, like it's working hard on something but unable to complete it. Now with Monterey, when I unmount and unplug the X5, it seems to work, but later when I plug it back in, it won't mount. Then I upgraded to Monterey (currently patched to 12.2.1) and started having issues with the X5.īefore Monterey, I could unmount the X5 and T7 and then unplug them. The X5 is so fast that I seldom notice that backups even happen. I started with macOS Catalina and later upgraded to Big Sur. I use the X5 for Time Machine backups and the T7 for general purpose storage. One is the X5 with a Thunderbolt interface, and the other is the T7 with a USB interface. I have a MacBook Pro (13-inch, 2020, Intel processor) and two portable Samsung SSD's.
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