Mac OS X 10.8.4

Mac OS X 10.8.4 was an update to Mac OS X 10.8 released on June 4, 2013. It had the following features:
 * Compatibility improvements when connecting to certain enterprise Wi-Fi networks
 * Microsoft Exchange compatibility improvements in Calendar
 * A fix for an issue that prevented FaceTime calls to non-U.S. phone numbers
 * A fix for an issue that may prevent scheduled sleep after using Boot Camp
 * Improves VoiceOver compatibility with text in PDF documents
 * Includes Safari 6.0.5, which improves stability for some websites with chat features and games
 * A fix for an issue that may cause iMessages to display out of order in Messages
 * Resolves an issue in which Calendars Birthdays may appear incorrectly in certain time zones
 * A fix for an issue that may prevent the desktop background picture from being preserved after restart
 * A fix for an issue that may prevent documents from being saved to a server using SMB
 * Addresses an issue that may prevent certain files from opening after copied to a volume named “Home"
 * A fix for an issue that may prevent changes to files made over NFS from displaying
 * Resolves an issue saving files to an Xsan volume from certain applications
 * Improves Active Directory log-in performance, especially for cached accounts or when using a .local domain
 * Improves OpenDirectory data replication
 * Improves 802.1X compatibility with ActiveDirectory networks
 * Improves compatibility when using mobile accounts
 * Security fixes

External References
Apple: About the OS X 10.8.4 Update