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I have somewhat of a weird issue. I have a client who wants to send their audio out from their MacBook Pro 15" Retina to their TV from the headphone jack output on the MacBook. The TV has a 1/8th audio input, so that all plugs in very nicely. After it's plugged in, the audio stops coming out of the MacBook's speakers, just like it would if you had headphones plugged in, but there's no audio coming out of the TV speakers.

When I plug in my MacBook Pro 15" (not Retina) with this setup, the audio works just fine. Is there something in the Retina model that's blocking this? Any advice would be great. Thank you.

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You say it works fine with your set up. Are you connecting to his TV? If so, it points towards the issue being with his MBP.

One quick bit of troubleshooting you could try - plug a set of earphones into his MBP and ensure audio is being sent. That'll help to isolate the problem.

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    Thank you for the response. Headphones work, and the correct output is set when we hook it up. His TV received audio from my iPhone and my MacBook Pro, just not the Retina one. Very strange.
    – user1809994
    Nov 30, 2012 at 17:52
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Is the client certain that the TV has a 1/8th input rather than output? Is the TV set to the correct input? I don't think there's anything different about the Retina MacBook Pro in this respect.

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    Yeah, the TV works fine with other audio input sources, it just seems to be the audio out on his MacBook Pro Retina, though headphones work fine. Maybe it's not putting out enough power?
    – user1809994
    Nov 30, 2012 at 17:52
  • That doesn't seem likely. Maybe the cable is plugged into the TV or the MBP properly. I'd try wiggling it around a little.
    – Chris Herbert
    Nov 30, 2012 at 20:26

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