Has anyone experienced this problem and know the solution? THe hard drive doesn't appear in finder or disk utility (some people are reporting it appears in disk utility but it is locked), but it still turns on and makes a really nice sound like it's running. I followed various suggestions, but nothing has worked. I also found page after page of discussions about how to fix the problem, but most of it doesn't make sense to me. I downloaded the new driver but to no avail. I did a search a came up with this which is a link to a reported problem and fix from WD. I've pulled an absolute blank as to when I updated, could have been a couple of months ago, and since I haven't used the hard drive in a few months it would make sense that I'm only experiencing the problem now.
I did a search around and it seems the problem is related to an update to 10.9 on my Mac. I've had a WD 1TB (WDBBXV0010BBK-01) since around 2012 and have had no problems up until the last few days.