I have seen this before on other Apple systems I've owned over the years. The advice is always the same (as I've seen posted here): unplug, check cords, disks, blah blah blah. These are never the problem. It's an error in the OS which changes over the year have fixed then broken again. Could we just get it fixed once and for all?
iMac 24″, macOS 15.3
Yes and have experienced this myself though rarely
Refer tp Sub Heading for additional Technical explanations from above link
System-wide unmount notification
Attempt to unmount
Finding the offending file and application
It's usually Spotlight
Sometimes Spotlight is so hung up, you can't add the volume to the Spotlight privacy list
I agree as it seems to be an issue for many users. The Apple hardware/system is very sensitive..
disk not ejected properly Mac M1 running Sequoia 15.3.2
