Apple on Tuesday released its Mac OS X 10.8.4 update, bringing improved WiFi connectivity and Microsoft Exchanged compatibility, FaceTime, Messages and Boot Camp fixes and more to the Mac.

In the release notes, Apple says that the 10.8.4 update has features and fixes that improve the stability, compatibility and security of your Mac. Apple lists the following changes:

  • Compatibility improvements when connecting to certain enterprise WiFi networks
  • Microsoft Exchange compatibility improvements in Calendar
  • A fix for an issue that prevented FaceTime calls to non-US phone numbers
  • A fix for an issue that may prevent scheduled sleep after using Boot Camp
  • Improved VoiceOver compatibility with text in PDF documents

Apple has also provided a solution to an issue where iMessages might show up out of order in Messages, much to the delight of many Mac users who have been irritated by this issue in the past.

A new version of Safari, 6.0.5, was included in the OS X 10.8.4 update, which improved stability for some websites with chat features and games, says Apple.

The OS X update also features a number of security fixes, so it is recommended that all OS X Mountain Lion users install it.

Closely following the release of OS X 10.8.4, Apple also made security updates available for OS X 10.6 Snow Leopard and OS X 10.7 Lion. 

Mountain Lion users can update to Mac OS X 10.8.4 through the Mac App Store or through Software Update.

The update arrives less than a week ahead of the start of WWDC 2013, which is set to kick off with a keynote on Monday. We expect to be treated to our first look at the next version of the Mac operating system, OS X 10.9, as well as iOS 7 during the keynote.

Apple on Friday informed developers that the OS X Software Update 10.8.4 seed project, which saw the release of eight beta builds, had closed, so we expected that the final public release was imminent.

Within those builds, developers spotted a reference to the new high-speed 802.11ac '5G' WiFi standard. It is widely expected that Apple will launch new Macs at WWDC, and it is believed that 802.11ac WiFi will be part of the new Mac lineup.

See also:

The Mac OS X Mountain Lion features you love (and the ones you hate)

Broadcom launches 802.11ac WiFi chips for PC and tablets

How much will Apple change iOS and OS X?

More evidence points to MacBook Pro, MacBook Air refresh at WWDC

New Mac Pro release date, rumours and leaked images