Mac OS X 10.6.4

Mac OS X 10.6.4 was an update to Mac OS X 10.6 released on June 15, 2010. It had the following features:

General fixes and improvements Fixes and improvements for Aperture 3 Fixes and improvements for external devices
 * improves compatibility with some Braille displays
 * resolves an issue that causes the keyboard or trackpad to become unresponsive
 * resolves an issue that may prevent some Adobe Creative Suite 3 applications from opening
 * addresses issues copying, renaming, or deleting files on SMB file servers
 * improves reliability of VPN connections
 * resolves a playback issue in DVD Player when using Good Quality deinterlacing
 * resolves an issue editing photos with iPhoto or Aperture in full screen view
 * resolves an issue with Parental Controls Time Limits for Open Directory or Active Directory users
 * resolves a display sleep issue with MacBook Pro (Early 2010) computers
 * resolves an issue with MacBook Pro (Early 2010) computers in which the right speaker may sound louder than the left speaker
 * includes Safari 5.0; for more information about Safari 5.0
 * Security improvements
 * adds tethered shooting support for additional digital camera models
 * addresses IPTC metadata compatibility issues
 * RAW image compatibility for additional digital cameras
 * resolves an issue with using third-party USB web cameras
 * resolves an issue with noise when using some third-party FireWire audio devices
 * resolves pairing issues with Apple remotes

External References
Apple: About the OS X 10.6.4 Update