Hi I've just installed 13.04 on my machine (but had the same problem with 12.10). The machine is a 2012 imac 21".
When I go to bluetooth settings, the system detects my magic mouse. It will allow me to input '0000' as the passkey and thinks its paired successfully. The mouse led keeps flashing however, and the mouse doesn't do anything.
When I go into the bluetooth settings the mouse shows as present but not connected and when I try to change the swith to 'on' it wont stay on.
what am I doing wrong? Thanks