The OS X v10.8.5 Supplemental Update is recommended for all users running OS X Mountain Lion v10.8.5.
– Resolves an issue that may prevent certain applications from using the FaceTime HD camera on mid-2013 MacBook Air systems
– Fixes an issue that may cause external drives to be ejected after the computer goes to sleep
– Addresses an issue that may prevent HDMI audio from working after waking from sleep
– Fixes an issue that may prevent certain USB Bluetooth adapters from working