Hey! I've had my current MacBook since the Feb '08 update, and I turned it on a few days ago and the bluetooth had disappeared, it wasn't showing up at all. I got it back from the Apple store after having the screen and top casing replaced, and it was working until a few days ago when I turned it on and it was "Not Available". I googled the problem, and I have tried the following fixes so far: Take out battery and hold power button. Leave battery in and hold power button. Cmd+Opt+P+R on boot, restart twice whilst holding. /var/root/Library/Preferences/blued.plist Didn't exist even with root user enabled. Any help would be great!