itch.io

Can't speak for what controllers will work best on your setup (especially since I don't even own a Mac myself), generally I would recommend using an actual RC radio most of all. There are models with USB connection possibility that can be found about for the same price as a Playstation/Xbox controller. And actual RC radio will give a lot more fine control. Also, since gamepads have self-centering throttle they will never be really ideal for simulator practice.