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Macbook HDMI Port Not Working? [How To Fix]
https://hdmitechnologies.com/macbook-hdmi-port-not-working/#:~:text=Turn%20off%20the%20HDMI%20device%20while%20keeping%20the,Reconnect%20the%20Mac.%20Turn%20on%20the%20HDMI%20device.
No sound over Mini DisplayPort to HDMI Ad ... - Apple
https://discussions.apple.com/thread/2639905
Select your TV from the drop-down list next to HDMI, below where it says "Select a device for sound output". Using either Finder or Launchpad go to Applications > Utilities > Audio MIDI Setup. On the left-hand side of the window you should now see HDMI.
macbook pro - MiniDisplayPort to HDMI adapter not working ...
https://apple.stackexchange.com/questions/125449/minidisplayport-to-hdmi-adapter-not-working
If it's just an audio issue, go to system preferences > Sound, and make sure output is set correctly. Some adapter/mac combos don't auto switch the audio-out on HDMI adapters. Some adapter/mac combos don't auto switch the audio-out on HDMI adapters.
Fix: HDMI Sound Not Working Mac - Appuals.com
https://appuals.com/fix-hdmi-sound-not-working-mac/
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