User profile for user: Solar278
Solar278 Author
User level: Level 1
11 points

External drive not showing up in sidebar under devices

I'm using a new 13" MacBook Pro, macOS High Sierra, 10.13.3. When I mount any of my Seagate external drives, they don't show up - anywhere. The disks are mounted, and can be unmounted using the disk utility, and I get a warning when I un-plug them without properly ejecting them - because I can't. The drives were working on this MacBook Pro, and they work on other Macs, so the drives appear to be healthy. In Finder Preferences "External disks" is checked, and in the finder sidebar, Devices are not hidden.

MacBook Pro TouchBar and Touch ID, iOS 10.3.3

Posted on Feb 12, 2018 10:21 AM

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User profile for user: dominic23
dominic23
User level: Level 10
84,018 points

Feb 12, 2018 11:01 AM in response to Solar278

Go step by step and test.


1. Temporarily remove com.apple.finder.plist and test.


Close all windows and quit all applications.

Hold the option key down and click the "Go" menu in the Finder menubar.

Select "Library" from the dropdown, then "Preferences" folder.


Look for this file.

com.apple.finder.plist

Right click on it and select " Move To Trash" from the contextual menu.


Restart the computer.


If this doesn’t help:


Right click on the Trash icon in the Dock and choose “Open”.

Right click on the com.apple.finder.plist and choose “Put Back”.


2. Reset PRAM: http://support.apple.com/kb/PH14222


3. Reset SMC. Choose the method for “On Mac notebooks with non-removable battery”.

https://support.apple.com/en-us/HT201295


4. Start up in Safe Mode. http://support.apple.com/kb/ph14204

To restart normally click the “Restart” button at the bottom.

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External drive not showing up in sidebar under devices

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