Apple released Mac OS X 10.6.4 Tuesday. The OS update includes several bug fixes, including some sleep and sound issues with MacBook Pro (early 2010) models. The update also fixes some issues for Aperture 3, and it improves RAW image support for some devices.

As of this writing, Apple has not yet published the specific security patches in the update.

Apple’s release notes:

General fixes and improvements

• 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, see this webpage
• Security improvements; for information about the security content of this update, please visit this article [does not yet include a link to information on this update]

Fixes and improvements for Aperture 3

• adds tethered shooting support for additional digital camera models
• addresses IPTC metadata compatibility issues
• Fixes and improvements for external devices

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

The update is a 315.5MB download through Software Update.