I just received a new mac pro. Because of where the tower has to be located in relation to where my keyboard/magic mouse are located, the internal blue tooth is too weak. The mouse is sluggish at times and skittery at others. This is my third magic mouse (mac pro at work and my mbp use magic mice -- love them!) and it's painfully obvious the behavior I'm seeing is not typical. I purchased a kensington bluetooth 2.1 usb micro adapter (same adapter I purchased for my older mac pro at work that didn't have built in bluetooth), hoping that I could get the system to use the external bluetooth adapter to drive the mouse instead of the internal one. So far, it seems that the system still insists on using the internal bluetooth device instead of the external one. How do I force it to use the external one? Is there a way to 'disable' the internal one? Thanks!