The 10.6.8 update is recommended for all users running Mac OS X Snow Leopard and includes general operating system fixes that enhance the stability, compatibility, and security of your Mac, including fixes that:

• Enhance the Mac App Store to get your Mac ready to upgrade to Mac OS X Lion
  
• Resolve an issue that may cause Preview to unexpectedly quit
  
• Improve support for IPv6
  
• Improve VPN reliability
  
• Identify and remove known variants of Mac Defender
  

What's included?

This update is recommended for all versions of Mac OS X v10.6 through 10.6.6 Snow Leopard, and includes general operating system fixes that enhance the stability, compatibility, and security of your Mac; including fixes that:

• Improve the reliability of Back to My Mac.
  
• Resolve an issue when transferring files to certain SMB servers.
  
• Address various minor Mac App Store issues.
  

Additional improvements

• Includes all the improvements in the previous Mac OS X v10.6.1, 10.6.2, 10.6.3, 10.6.4, 10.6.5, and 10.6.6 updates.
  
• Includes Safari 5.0.4.
  
• Includes RAW image compatibility for additional digital cameras.
  
• For information about the security content of this update, please visit article HT1222.
  
• Resolves a window resizing issue with X-Plane 9 on Macs with ATI graphics
  
• Addresses an issue with MacBook Air (Mid 2010) computers that could cause a kernel panic.
  
• Address issues in the AirPort driver for certain devices.
  
• Improves brightness on external displays and projectors.
  
• Addresses an issue where DVD Player may display black video on some Macs using the 64-bit kernel.
  
• Addresses an issue with some NEC displays in which the screen may appear black when connected to a Mac Pro (Mid 2010).
  
• Resolves an issue in which some Multiple Master (MM) fonts were missing from Mac Pro (Mid 2010), MacBook Pro (15-inch & 17-inch Mid 2010), and iMac (Mid 2010) computers.
  
• Addresses various issues with MacBook Air (Mid 2010) computer performance.
  
• Resolves an issue in which clicking the Updates tab in the Mac App Store could cause the Mac App Store to become unresponsive.
  
• Fixes a problem opening an afp:// URL that points to a file, and changes the AFP mount path to conform to previous Mac OS X releases. For details, see article HT4538.
  
• Includes the ability to repair certain issues that may prevent hardware RAID volumes from mounting. For more information, see article TS3631.
  
• Fixes a rare issue in Mac OS X v10.6.5 that could cause user accounts to disappear from the Login window and System Preferences after putting the system to sleep.
  
• Improves the reliability of dragging files or folders to the Trash when using an NFS home directory.
  

The Mac App Store, a new application you'll find in the Dock, includes the following features:

• Discover Mac apps: Browse featured apps, top charts, and categories, or search for something specific.
  
• Buy and install: Easily purchase apps with your iTunes account. Apps install in one step and are quickly available from the Dock.
  
• App updates: The Mac App Store keeps track of all your purchased apps and notifies you when free updates are available.