This is taken from my blog but mods won't let me link to it so I will post it here:
This came about after buying a Magic Mouse and finding that the mouse wasn't working how it should. The pointer was lagging and the mouse would disconnect are reconnect at random .
Taking a look on the net I found lots who have the same problem even with older Mac Pros. There is a fix for the older models which involves swapping antenna wires that go to the bluetooth card. Now I can't verify this but...
Mac Pro Magic Mouse Bluetooth Issues Solved
This came about after buying a Magic Mouse and finding that the mouse wasn't working how it should. The pointer was lagging and the mouse would disconnect are reconnect at random .
Taking a look on the net I found lots who have the same problem even with older Mac Pros. There is a fix for the older models which involves swapping antenna wires that go to the bluetooth card. Now I can't verify this but...
Mac Pro Magic Mouse Bluetooth Issues Solved