Yes, it works. You need a short USB A female to USB C cable. On the box of the adapter that comes with the pedals, set the switch to the car symbol (LED lights up green), then it works.
Andreas, Thun

as I use Win10 PC I can't answer it, maybe Thrustmaster support knows

With X-Plane 11 they work great, with iMac I'm not so sure, but it's quite possible that it works.