The latest update for Mac OS X also includes Safari 5, released last week with extensions, expanded HTML5 support, and the new Reader functionality. The 315.5 MB update is available via software update and is recommended for all users running Mac OS X Snow Leopard.
In addition to general operating system fixes that enhance the stability, compatibility and security of Mac systems, Apple said it includes fixes that:
resolve an issue that causes the keyboard or trackpad to become unresponsive
resolve an issue that may prevent some Adobe Creative Suite 3 applications from opening
address issues copying, renaming, or deleting files on SMB file servers
improve reliability of VPN connections
resolve a playback issue in DVD Player when using Good Quality deinterlacing
resolve an issue editing photos with iPhoto or Aperture in full screen view
improve compatibility with some braille displays
Apple released numerous betas for Mac OS X 10.6.4. Since May, those familiar with the builds said they were clear of known issues.
The last update to Snow Leopard, Mac OS X 10.6.3, was released in late March. It packed fixes for QuickTime X and Open GL-based applications.