Yosemite: Western Digital External Drives fully supported?
I use a Western Digital My Book Studio Edition II 2TB via FireWire as my TimeMachine backup drive. I still run Mavericks on my iMac 27" 2012 model (Core i5, 2.9 Ghz, 8GB Ram, 1TB Fusion drive).
It had no problems with Mavericks since I updated to wd drive manager 3.1.0.14, which had been released after reports of data loss with WD Drives. There is still no update from WD for Yosemite. I hesitate to update to Yosemite since I found this post: http://community.wd.com/t5/External-Drives-for-Mac/WD-4T-MyBook-studio-II-extrem ely-slow/td-p/815385. Did anyone try it?
iMac (27-inch, Late 2012), OS X Mavericks (10.9.5), Core i5, 2.9 Ghz, 8 GB Ram, 1 TB FD