Jun 2, 2017 - (I've found many people complaining, but no answers. A script which. I have multiple devices I connect to my mac and for some they had the same issue. So just going into Sound Preferences and changing the output to Internal Speakers/Headphones seems to stop switching to monitor sound. Feb 05, 2016  New LG Ultra Wide Monitor - No Audio via displayport? Discussion in 'Mac Pro' started by steveOooo, Feb 3, 2016. It shows DP in the audio settings but its greyed out. I can always plug some USB speakers into the back of the monitor for better than Mac Pro internal speakers.

I have a 13' late '11 MBP OS X Lion 10.7.5 I am trying to hook up to my LG HDTV with a Thunderbolt HDMI cable. Getting the display onto the TV is a snap.

The audio, however, is not working. The thing I'm noticing is in the Sound tab the TV is not an option for Sound Effect, Output, or Input, only internal speakers and aggregate device.

I have updated my software, reset SMC and PRAM, gone to Audio MIDI Setup (where the TV isn't optional), plugged the Thunderbolt in while the TV was off/on, etc. Can someone tell me why the TV is not appearing in the Sound options? That model of MBP supports audio through that adapter, so you should be getting sound. It could be any number of things.

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I think your problem is on the TV side, but Here are a bunch of things to try: First, make sure you're connected to your TV and getting an HDMI video signal to the video input you've selected. Go to your MIDI Audio Setup again and make sure that your thunderbolt output is set to 'Use this device for sound output.' Highlight it, and go down to the setup (gear icon below) to set it. From your Apple Menu, open your System Preferences and choose Sound.

Try setting your 'Use audio port for:' to Sound Input, as it may be hogging the audio out channel and not letting your thunderbolt use it. Make sure your system volume is turned up there too. If you have various sound drivers installed and showing up in Audio MIDI Setup, just leave them alone for now, and DO NOT use any aggregate devices. Select your thunderbolt output and make sure the volume sliders are turned up. You should see the speaker icon next to that audio output selection too. We're not interested in 'Sound Effects' in this case, so don't worry about that. Pc version of mac mini.

Recheck ALL your connections. Make sure your volume is turned up on the MBP. THe content you're trying to play probably has a volume control of it's own too. Make sure it's turned up. And make sure that your TV volume is up, and not accidentally on Mute.

IF your TV's set up to play audio through your amplifier (surround, etc.) make sure your amp is on, set to TV as it's input, and volume is up. Don't turn these all up to max!

When you find the culprit, you don't want to blow anything out. Make sure your TV isn't in SAP mode. Check to make sure you don't already have an audio source plugged into the audio jacks for that input on your TV. HDMI only on that TV input.

Check the setup options for Audio in the app you're using to play your content. If it's a movie, for instance, and you're using VLC as your player, check your Audio Device setup in the Audio menu option. Make sure your TV isn't setup to expect audio from it's Stereo input jacks, as if you were connecting via component video and audio. Light up the menu options on your TV, and just double check your Audio options settings.