No HDMI Sound Output

[Ry459]

HI, I don't have any sound output on Mojave 10.14.2 iMac late 2013, 3.4GHz Intel Core 7, NVIDA GeForce GTX 1060. I am trying to use the HDMI Port on my Graphics Card. Need a little help, been messing around for a few days now without any success. Cant do anything to technical, so need help accordingly. Many thanks in anticipation.

 

[toleda]

Moved to correct Forum.
macOS does not support Nvidia/Pascal. Nvidia web drivers do not support macOS/Mojave.
macOS/GTX 1060 HDMI audio is not possible.