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Malaga19 Author

Level 1

8 points

HDD won't unmount

Trying to run disk utility on my 8 TB HDD. Fails due to unable to unmount the drive.

Mac Pro, macOS 10.14

Posted on Nov 22, 2021 12:36 PM

Top-ranking reply

BDAqua

Level 10

245,459 points

Posted on Nov 22, 2021 2:04 PM

Most generally something is using the drive ...

Start with this...

Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode? Could take 10 minutes.

Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.

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HDD won't unmount

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