I cannot seem to use my bluetooth keyboard (offbrand) and microsoft bluetooth mouse at the same time on Mountain Lion. Whenever I switch over to using the mouse, the keyboard stops working even though under the bluetooth menu it says it is still connected. I either have to switch off the mouse or turn off and on the keyboard to start typing again. I have tried resetting the PRAM but that didn't make a difference. I also updated the aluminum keyboard firmware update 1.1 and it doesn't seem to do anything either. I know it probably isn't interference because they both work flawless on the same machine in a windows bootcamp partition. Is there anyfix for this?