Yesterday I had to reset my iMac (2008 aluminium) because of a generalized instability (it was a couple of weeks IDid not restart it). Anyway, once restarted, the wireless Mighty mouse was gone. I conneted the wired one, searched for Bluetooth and a message saying I did not have it installed. I recall I updated the firmware when it came out, 2-3 weeks ago. Any hint? Could I try reinstall the driver?