Joystick

I would second den.thed's comments on abandoning using your iMac for serious gaming. FWIW, I built my own Windows 10 gaming rig to play each of the flight simulators that I have: Microsoft Flight Simulator X, X-Plane 11, Prepar3D v5, & the new 2020 Microsoft Flight Simulator. The key is the GPU as some of these, especially the new Flight Simulator, are extremely graphics intensive. For that, I would suggest going with the Nvidia RTX cards ... and I currently use the Logitech Extreme 3D Pro flight controller.

It really comes down to how "real" you want your flight experience to be. It can be very addicting ... and expensive!

I used a TrustMaster Force Feedback for Falcon 4 on my G3 iMac, but that was way back in the early 2000's.

see > https://www.amazon.com/customerpicks/Explore-joysticks-for-Macs/dc546a80fa17a2057629

Your best bet, is to check out the xPlane forum to see what the folks are recommending with newer Mac's.

see > https://forums.x-plane.org/index.php?/forums/topic/145625-mac-compatible-joystick/

Welcome!

I've not seen a lot of XPlane users here, in fact, not even many gamers or simmers. I suspect you will get faster answers at:

https://www.x-plane.com/kb/

There is also a private site dedicated to X-Plane that has forums: https://www.x-plane.com/kb/

https://forums.x-plane.org

I racked up thousands of hours on that sim a lot but it was on a 2004 PowerMac running OS 10.4, so what worked well with my Saitek stick with version xplane 7 may not work on current versions.

Yeah’ sadly a lot of folks gave up on Mac’s as gaming computers. Mostly because the GPU’s could not be upgraded or easily replaced when they cooked in the slim iMac’s all-in-one design.

Personally if I was into serious gaming and flight sim’s, I would get a gaming tower and use the iMac for everything else.