We have updated the public release of Half-Life: Source. This update contains all the changes from the recent beta, thanks to the whole community for their help with testing and suggesting new features. Changes in this update are:

• Converted Half-Life:Source to the new SteamPipe content system, for optimized delivery of the game
• Added support for Linux and Mac OS X operating systems
• Added an optional HD pack, you can enable this via the Video tab in the Options menu
• Numerous bug fixes contributed by community members