Did you go to sound input and select a mic?  You may need a mono to stereo plug adapter because my Denon mic has a mono plug.  Mac may be looking for headphones.
While I was waiting for my UMIK, I just used the built in microphone on my MacBook.
Buy a UMIK-1, it’s worth it.  I just bought one last week and it completely changed my sub placement and EQ.
I have a MacBook Air M1 from 2020.  A UMIK-1 plugs right into USB-C