So I have macOS Mojave version 10.14.2 and sony 42503 ZX Stereo Headphones with Mic. I don't know what is wrong. I have used my mic on tabletop simulator before and it worked, now it just keeps rejecting it or something? Also, I've checked my mic multiple times. It does in fact work. I have Garageband recordings reading back to me the sounds I make in the mic. I also have my quick key working for toggle mic in tabletop simulator, the grey sound symbol shows next to my name. Then on top of that, my settings show me a mic as an external microphone. The only options that tabletop simulator gives me is internal microphone and <default>.