SWMBO's iMac has a USB headphone/microphone. I have the same setup on my PC. We have to have separate computers because of our religious differences: She's Macintosh, I'm Windows.

She has several ongoing Zoom training sessions, and so far nobody has been able to hear her. We swapped headphone/microphones, still the same.

What's a simple way on her iMac to test and see if her microphone works? I have no idea how to troubleshoot anything on an Apple system, so if the microphone does work (I have no reason to suspect it is broken) what should I do to make it connect with Zoom?

tanstaafl.