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No sound playing Source games on Mac

I have no sound playing Source games. How can I fix this?

In Portal, do the following to try and fix your missing audio:

  • Open Steam > Library > Right click on the game you are having issues with
  • Click on Properties > Set Game Launch Options
  • Type -snd_openal
  •  Press Enter

NOTE:

This may cause some rare crashes with Portal

Problem with Steam?

Contact Steam Support