Apple has made the OS X Mountain Lion 10.8.5 update available for download. The latest OS revision fixes a number of issues, as well as integrates security fixes for the year-old OS. As usual, the update is available from the Mac App Store software update tool, with downloads available for the incremental update
as well as a combo update
suitable for upgrading from any version of Mountain Lion to 10.8.5.
The update is recommended for all users. It 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, fixes an issue when transferring large files over Ethernet, improves performance when authenticating to an Open Directory server, addresses an bug that prevented a smart card from unlocking preference panes in System Preferences, and contains the improvements included in MacBook Air (Mid 2013) Software Update 1.0.