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Level 1

5 points

external hard drive will not eject using High Sierra

Hi, I am using both an iMac 21" (2015) with High Sierra and a 13" MB Air, also with High Sierra. I have a WD Elements external HD that I have been using for a Time Machine backup. I want to erase it so I can start over but the drive will not erase, keep getting an error message saying the drive cannot erase because disk utility could not unmount the drive. Also, it will not eject so to do so I have to shut down and unplug the drive. Help!

MacBook Pro, Mac OS X (10.7)

Posted on Nov 15, 2017 11:42 AM

Best reply

rkaufmann87

Level 10

140,418 points

Posted on Nov 15, 2017 12:14 PM

First, restart the computer and re-try. If that fails try another USB cable, then can and do go bad.

By chance, do you have any WD software installed, any cleaning apps installed or any Anti-Virus apps installed?

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external hard drive will not eject using High Sierra

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