Problem You are unable to get any sound via your HDMI connection to your Mac when using a Mini DisplayPort or Thunderbolt adapter. This may have occurred after upgrading to the Lion operating system. Solution Try the following: Check the device is selected as it may not work automatically: Click the Apple icon in the top left of the… Continue reading No HDMI sound using Mini DisplayPort or Thunderbolt
Knowledge base for Windows, Mac & Assistive Technology.