What's New:

The 10.8.5 update is recommended for all OS X Mountain Lion users and has features and fixes that improve the stability, compatibility, and security of your Mac, including the following:
  • Improves Xsan reliability
  • Resolves an issue that may prevent a screen saver from starting automatically
  • Improves AFP file transfer performance over 802.11ac Wi-Fi
  • Fixes an issue that may prevent Mail from displaying messages

For detailed information about this update, please visit: http://support.apple.com/kb/HT5612 Learn more.