The OS X Mountain Lion v10.8.5 Update is recommended for all OS X Mountain Lion users. It improves the stability, compatibility, and security of your Mac.
This update (build 12F37, only one build higher than the last beta, released 09/04/13):
- 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