Hello smart techy people,
I’m having trouble getting Audacity to work with my new external microphone.
The mic’s 3.5 jack is connected to a V-cable / headphone jack splitter that was provided with the mic. (In the other leg of the V-cable I have connected the speakers, which work fine.)
The mic is detected in the Mac’s System Preferences/Sound, and I can see the input level bar responding when speaking into the mic. I have slided the input volume bar to maximum.
Yet in Audacity the external mic does not show up (in Preferences>Devices). Quitting and restarting Audacity does not work, and neither does Transport> Rescan Audio Devices.
I’ve tried changing some settings in Preferences>Quality (but to be honest I have no clue what to select there.)
I think I must have read every available information on this forum and the wider web that combines the words 'Audacity", ‘microphone’ and ‘Mac’, but have run out of ideas. 
I’m really hoping one of you has another suggestion! At any rate, thanks for taking the time to read this.
Tech details:
Microphone: Trust Madell 21672 
https://www.trust.com/en/product/21672-madell-desk-microphone-for-pc-and-laptop#FAQ
Macbook Pro with macOS High Sierra version 10.13.6
Audacity version 2.3.2