Help connecting MBP to HDTV w/ adapter....no sound

[dowiginton]

Ok, pretty new to the Mac side of things. I got my MBP about 3 weeks ago I think. I got a mini display to hdmi adapter (off ebay, so this may be the problem). I hooked it up to my laptop and tv and it took me a while to find the mirroring box but I got that working so what's on my computer pops up on the tv. I go to play a tv show, and the sound is just on my computer. I went under system pref and sound but only "internal speakers" is available for the output. Am I doing something wrong? Or do I just have a cheap adapter?

Thanks,
Dallas

 

[spinnerlys]

Mini DisplayPort does not put out sound, there are adapters for that.

Have a look at this extensive guide: https://forums.macrumors.com/threads/792106/

 

[TwinCities Dan]

Although HDMI supports both video and audio, Mini DisplayPort does not.

You will have to run a dedicated line for audio.

 

[dowiginton]

Ok guys. Thanks. Should checked here before buying. Only cost me $12 tho so not a huge lose. I'll get that adapter.

 

[kny3twalker]

Although HDMI supports both video and audio, Mini DisplayPort does not.

You will have to run a dedicated line for audio.

Displayport supports audio, but apple has to impliment it. Which they have not yet.