Hello, I've finally grown tired of the ridiculous bluetooth performance of my mac pro (2009). I've got a Magic Mouse which I would like to start using for its intended purpose rather than having it sit on the desk as a decorative object. I had both the Mac Pro and the Magic Mouse tested in an Apple Store and as far as they're concerned they're both working properly (b******t!). I read there's not much I can do since it's a design defect, so I can either assemble a custom antenna or buy a usb dongle: (http://nobblynoel.wordpress.com/2010/04/25/mac-pro-2009-bluetooth-fix/) I was thinking to get a USB dongle so that I'd have bluetooth 4.0, but I don't know which one because I read they're not all compatible and some might have problems working properly. I would also like to keep the expenses at a minimum since, if you ask me, it should be Apple fixing it for free. Which method do you guys suggest? Which dongle? Thank you for your help!