Hi all, I got my Mac on Saturday and since then I have had 2 instances of the mouse ceasing to work. I have checked that bluetooth is on, which it is, and MM is listed there as an attached device. However, when you move the mouse, nothing happens, the cursor stays put. I end up connecting a spare mouse. Disconnecting MM from the bluetooth menu, then re-connecting. The batteries are new and I've tried a couple of sets.