I”m using a Helix LT into a late 2012 Mac mini. As a hobbyist, I normally run the Helix into my amp using the 4cm but I sometimes need to use headphones in the house, pain in the lollipop re the cable.
I bought a Razer Barracuda X, 2.4ghz w which uses a dongle, very small, into the Mac’s USB A. I got a uGreen USB A to USB C adapter and it connect no problem. I use Rogue Amoeba’s Soundsource to switch inputs and outputs, very nice.
To hear myself, I use Garage Band with a simple audio setup. You can also use Transcribe or other to play tracks. Make sure your Helix patch outputs to multi or USB AND SELECT THE helix for input and the Razers for output and you’re good to go!
I paid $125 CAD on Amazon for the headphones and $15 for the adapter. Razers are really nice.
Have fun!