Drive: My Passport for Mac - 500Gb
Desktop: Mac Mini running Mavericks
Issue started occuring tonight.
I started getting the exact same error tomight also.
Not sure if it started completely on its own or if I actually did something, but the drive had been working for many many months until now.
I have now managed to get it working again, and have been pulling my data off it as I will be replacing it now.
This is what I did…
Go to Activity Monitor and look for a process called fsck_hfs.
If this is running, force quit it.
Then look for any of the WD programs, and force quit them…I came across a few called wdhelper, wdsecurty, wddriveutilities etc etc.
Force Quit all of them.
Then unplug your drive. Wait 10-20 seconds, plus it in again, and you shoudl see the WD Unlocker app appear.
Pop it open and unlock your drive.
You should now have access, and from what I can see, continue to have access (I pulled a 14Gb file from mine with no issues) .
What I have discovered is that the moment you open one of the other WD applications … WD Security, WD Drive Utilities it seems to dismount the drive.
Also verifying and running repairs on the drive in Disk Utility, seem to cause it to dismount.
Needless to say, all my data is getting downloaded and moved elsewhere…my trust is gone