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Level 1

7 points

External Hard Drives not Mounting after Yosemite Upgrade

I've just upgraded to Yosemite, and none of my external (USB) hard drives are mounting (they don't even appear in Disk Utility).

Any ideas?

Posted on Oct 19, 2014 2:53 AM

Best reply

rssg

Level 1

19 points

Posted on Oct 19, 2014 4:11 AM

Plug in your USB disk and run the following command on the terminal:

diskutil list

You should see something like this:

~ $diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *250.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 124.5 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Apple_HFS SecondOS 124.6 GB disk0s4

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS MacOS *124.1 GB disk1

Logical Volume on disk0s2

8FC6DFC6-B91D-41F4-9849-7ADFDDBBA048

Unencrypted

/dev/disk2

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *16.0 GB disk2

1: DOS_FAT_32 16GIG 16.0 GB disk2s1

~ $

You should see *all* your drives. What do you get?

View in context

41 replies

Nov 23, 2014 9:29 AM in response to The_V-Man

I don't know if anyone has mentioned this yet, but after hours of searching for an answer as to why my external hard drive did not show up on my desktop after upgrading to Yosemite, I clicked on the Finder, clicked on Preferences and under the General tab there's a section that says, "Show these items on the desktop," where I simply checked "External Drives." All is well now!

rrenga

Level 1

8 points

Dec 4, 2014 8:24 AM in response to lunartune

It worked for me as well.. awesome 🙂

Dec 8, 2014 6:28 AM in response to The_V-Man

Struggled with this since updating to Yosemite but finally found a solution. https://www.youtube.com/watch?v=R-2NCRcylK0 If the video is no longer available search 'how to enable NTFS write support on Mac OS X Yosemite for free'. Hope this helps.

xhsc

Level 1

0 points

Jan 3, 2015 3:55 PM in response to lunartune

THANK YOU THANK YOU! Downloaded for free, ran the program, and my WD Passport works like a charm. Thank you SO much.

The_V-Man Author

Level 1

7 points

Mar 13, 2015 9:26 PM in response to The_V-Man

Seems as though i'm not the only one with this issue - there's another massive thread with various 'solutions' none of which have worked for me.

It does appear to be a known issue that Apple have refused to acknowledge (or fix) 😕

Mar 18, 2015 12:12 AM in response to The_V-Man

I have a problem with loading CDs into the CD slot since upgrading to Yosemite a few days ago.

any suggestions?

Mar 21, 2015 11:08 PM in response to autoskool

I cannot get to install the Kext Utility download cause Apple somehow blocks it . I get this message:

“Kext Utility” can’t be opened because it is from an unidentified developer. Your security preferences allow installation of only apps from the Mac App Store and identified developers.

anybody knows how to work around this??

thanks in advance!

Apr 2, 2015 7:14 AM in response to Sandra Pesch

“Kext Utility” can’t be opened because it is from an unidentified developer. Your security preferences allow installation of only apps from the Mac App Store and identified developers.

go to System Preferences... Security...

there should be a message saying the app was blocked

and you can click "run anyway"

(note: technically you should have googled this, because it is basic knowledge that is off-topic for this thread)