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Question: USB Hard drive shows in System Report but doesn't mount

A 2TB USB Western Digital HDD shows in System Report but doesn't mount. What could be the problem?

I tried it on Mac OS 10.9.5 as well as on 10.10.5


Running 'diskutil list' doesn't list it either.

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Apr 23, 2018 3:49 PM in response to Paramvir Singh In response to Paramvir Singh

Could be a failed WD device, bad cable, could be too much power being drawn, bad USB port, etc.


Try connecting the WD device to a different computer system and see if it works there, try connecting the device via a different USB cable, try removing all other USB devices and unpowered hubs and the rest and other than a keyboard and mouse if you're using those and test the WD device again, try using a different USB port on the system, etc...

Apr 23, 2018 3:49 PM

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Question: USB Hard drive shows in System Report but doesn't mount