No record signal using UA Thunderbolt interface

I’m using a UA Apollo Quad Thunderbolt for my microphone but not seeing any level getting to Audacity even though the set up is correct. I’ve searched and tried all the suggestions, Security & Privacy settings, software updates, etc. I can see the meter working on my Mac when in the Sounds preference panel so the signal is getting through that far, but not to Audacity. HELP!

If you haven’t done so already, check the recording volume control which is now “hidden” under the recording volume meters.