WD My Passport for Mac 1TB and OS X Yosemite

WD External Drives External Drives for Mac
6

I also have a My Passport Ultra 2 TB bought 1 month ago.

With Mavericks it randomly worked, otherwise it was not even recognized at all (formatted for mac).

Now since I have upgraded to Yosemite, it is not recognized at all, although the white LED is on and the disk is spinning.

I am really looking forward for WD to find a solution.