I have a 2013 Mac Pro running High Sierra connected to an UltraStudio 4K for audio monitoring. It’s a selection that I can make in the audio control panel in System Preferences, just like “Built-in”. But while I have a NoMachine connection with the PC I use for email, any audio or video I have playing speeds up by about 50x, zipping through the song or video I have playing, for example in YouTube or Pandora. I have to quit NoMachine to get back normal audio playback.
Switching to the internal speaker only works sometimes. Right now I have to restart my Mac because I no longer am able to open System Preferences. I know this might be an outlier but I’m curious to know if others are having problems with video or audio playback on their Mac while using NoMachine to connect to a PC.