Ok, is anyone else who upgraded to Yosemite yesterday having a problem with their Magic Mouse? Firstly, my Bluetooth option on the top right is greyed out with a squiggly line through it. When I click on the symbol it says Bluetooth unavailable. Secondly, my mouse is acting like a regular USB mouse, not a magic mouse. Scroll is dead and the system preference for it has a very rudimentary preferences window. Nothing like the Maverick options where it shows a video of a hand using the mouse and all of its features. I tried deleting the com.apple.Bluetooth.plist, but that didn't work. I reset the PRAM, that didn't work....any ideas???