I connected it via Bluetooth and direct link. It appears that the Mac sees it; it shows up in the Game Controller section of System Preferences. I wrote to 8bitdo and they sent links to a couple game controller testing sites:
https://gamepad-tester.com/
https://hardwaretester.com/gamepad
I tested the controller with several of my games. These it didn't work with:
Disney’s Dreamlight Valley (from Apple Arcade)
Temple Run Puzzle Adventure (from Apple Arcade)
Spire Blast (from Apple Arcade)
Mini Motorways (Apple Arcade)
Kensho
These it did:
Oceanhorn 2 (Apple Arcade)
Patterned (Apple Arcade)
What the Golf (Apple Arcade)
Sasquatch (Apple Arcade)
Lumen (Apple Arcade)
I started to set the 8bitdo controller up in Steam and it seemed to respond well to it. I didn’t try it in my Steam games yet though.
So now I have a dilemma. Do I keep the 8bitdo controller for the games it does work with and hope for a fix on the others, do i just keep my Nimbus+ and hope for a fix, keep them both, or try to find another controller.