Apple today released 10.8.5 update which is recommended for all OS X Mountain Lion users and improves the stability, compatibility, and security of your Mac.
This update:
• Fixes an issue that may prevent Mail from displaying messages
• Improves AFP file transfer performance over 802.11ac Wi-Fi
• Resolves an issue that may prevent a screen saver from starting automatically
• Improves Xsan reliability
• Improves reliability when transferring large files over Ethernet
• Improves performance when authenticating to an Open Directory server
• Addresses an issue that prevented a smart card from unlocking preference panes in System Preferences
• Contains the improvements included in MacBook Air (Mid 2013) Software Update 1.0
• About the OS X v10.8.5 Supplemental Update
The OS X v10.8.5 Supplemental Update is recommended for all users running OS X Mountain Lion v10.8.5. This update:
• Resolves an issue that may prevent certain applications from using the FaceTime HD camera on MacBook Air (mid-2013) 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
For detailed information about this update: http://support.apple.com/kb/HT5815
For detailed information about the security content of this update: http://support.apple.com/kb/HT1222