OS X Yosmite

Is the new Yosmite compatible with WD my Book.   The last time a new OS came out (maverick)  the my book crashed and took about a month to get the kinks worked out…

Beans12

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WD Drive Manager is NOT 100% Yosemite compatible  - unexpectedly quits if you delete or change the RAID mode on an external disk.
I recommend uninstall WD Drive Manager to avoid other problems, until WD releases a update.

if you need to erase the My Book Studio II using Disk Utility app in OSX

Fortunately this time, data on the hard disk is not deleted :smileyvery-happy:

Having similar problem. Just upgraded to Yosemite and while the My Book Studio mounts, Time Machine seems to be stuck in a Preparing Backup mode. Not sure if this is the hardware or the software, or both, having the issue. I am going to leave it running overnight and see what I find.

Not even a full minute after posting my message, Time Machien began backing up to the My Book Studio.

All appears to be functioning properly. :smiley:

is there a formal respons from WD on the issue?

thanks Wizz

I honestly think I was just being impatient. When it did start to backup, there were 14G, so that may explain the lengthly “preparing to backup” time.