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No sound through hdmi - macbook pro - Apple Community
https://discussions.apple.com/thread/4134669
2011 Macbook Pro. 3 week old Vizio 42" smart HDTV. 15" HDMI to Thunderbolt cable off Amazon. First the obvious: System Pref - Display - Mirror, etc. Then in System Pref - Sound - Sound Effects, make sure that "Play sound effects through" is clicked on your tv. This didn't change until I went in and did it. This is what made it work for my tv.
Connect to HDMI from your Mac - Apple Support
https://support.apple.com/en-us/HT204388
Check if you need an adapter. Mac computers that have any of the following ports can …
Fix: HDMI Sound Not Working Mac - Appuals.com
https://appuals.com/fix-hdmi-sound-not-working-mac/
No sound through hdmi - macbook pro - Apple Community
https://discussions.apple.com/thread/4134669?page=2
Question: Q: No sound through hdmi - macbook pro. I can connect my tv to my macbook pro through a HDMI cable and the picture shows up perfectly. However, the sound goes through my laptop speakers and not through the tv. When I go into Preferences --> sound --> output, there is not option to select for the hdmi, just the internal speakers. ...
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