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So I have a MBP 2012 and I just recently bought a mini displayport to hdmi cable, the video works great when plugged in, but no audio. When I go to System Preferences > Sound and look at the sound output, I don't have the hdmi option. What gives?
Thank you for your time in reading and responding to this!
Mac Pro, OS X Mountain Lion (10.8.2)
No HDMI audio output option will appear unless a suitable audio input option is also available on the input device. Make sure it is configured to receive audio from the port you are using. Not all receivers detect and switch automatically to the correct audio port.
Also, check the unfortunately named "Audio MIDI Setup" program in your Mac's Utilities folder. It will show you multichannel audio options for multichannel audio sources.
One more thing... make sure the adapter you are using specifically describes it as a "Thunderbolt to HDMI adapter with audio support". Earlier Macs had Mini DisplayPorts with no audio. Unless you buy the correct adapter audio won't work.
Correct adapters for your MBP are available for less than $10.
Ok so I double-checked and my adapter does have audio support. What do you mean by "Make sure it is configured to receive audio from the port you are using?" I am confused why it will show the video no problem, but it won't play the audio at all.
This a function of your audio receiver. Make sure it is configured to receive audio from the same HDMI port, and not some other input source.
Mini DisplayPort to HDMI Problem
