How’d it work for you? Let us know in the comments. I've used the Club 3d CAC-1331 with aMac mini 2018 and a AMD RX. All HDMI to DisplayPort adapters require USB power because HDMI doesn't have enough power to do the DisplayPort conversion. It can do 4K 60Hz 10 bpc, while HDMI 2.0 is limited to 4K 60Hz 8 bpc or requires chroma sub sampling for 10 bpc. Using the above steps, I got HDMI sound working on my MacBook Air as well as my girlfriend’s MacBook. DisplayPort has more bandwidth than HDMI 2.0.

I was using an external display via HDMI via my 2019 MacBook Air with no issue before upgrading to the 14 Pro. Your Mac will absolutely be able to deliver video via HDMI with zero lag. Your sound should now hopefully be working through HDMI under OS X Lion. As mentioned earlier check your adapter or HDMI cable. Plug in your Mini DisplayPort or Thunderbolt to HDMI adapter, make sure that HDMI is selected as your Sound output in System Preferences and give your Mac a whirl. Once you’ve flushed both the SMC and PRAM, allow your Mac to boot properly. The instructions on doing this vary from computer to computer, but Apple’s got a great support document that explains how to reset the SMC on any Mac you own. If you do this correctly, your Mac will restart and you’ll hear the startup sound a second time.Ĭongrats, your PRAM’s reset! Now let’s reset the SMC for good measure.

This must be done before you see the gray boot up screen.ĥ) Hold down the keys. Put your fingers over them, but don’t press them yet.Ĥ) Immediately after turning on your computer, hold down Command+Option+P+R. What you need to do are flush out your Mac’s PRAM and SMC, resetting them.Ģ) Locate (but don’t press) the following keys on your Mac’s keyboard: COmmand, Option, P and R. The fix is fairly simple, but it might take a few times.

Displayport to hdmi not working mac