I jst got a new bluetooth mouse. It pairs on my sisters computer running Snow Leopar but not on mine running Lion. Thus it is a problem with my computer. I have tried everyting : deleted .plist in Library reset smc reset pram reset power repaired permissions turned bluetooth on/off nothing seems to work and my reserch on the internets as hit a dead end. So here I am asking help to the knowledgeable Macrumors community ! Anybody got an idea of what i can do ? (except reinstall SL, obviously) Cheers, titatom edit : I also tried all passkey options. When I choose 1234 as a key, it pairs for half a second and they it drops. "The pairing attempt was unsuccessful. The devices is refusing the pairing attempt. Refer to the manual..."