I recently bought Microsoft's Wireless Laser Mouse 8000 and installed IP 6.2.2. The mouse is working fine but I found that the drivers do not allow my iMac to power save correctly. Firstly, the display does not dim after a period of inactivity and the computer does not enter sleep mode automatically. I've gone into the Bluetooth preferences and unchecked the "Allow Bluetooth devices to wake this computer" option. However, the computer still does not go to sleep with the wireless mouse paired. I hope Microsoft can address this issue in the next driver update.