I'm not with Laminar Research, just a fellow simmer, but I've checked in the X-Plane 11 file structure for my Windows version (I don't have MAC OS) and there is a T16000M joystick configuration file listed for MAC OS and the photo below, which hopefully is the joystick that you referring to?
If this is a USB device (which I believe it is?) then you simply plug it into your PC, start up X-Plane 11 and you should be prompted to calibrate the joystick on its first use. If you're not prompted, then go to the Settings/Joystick page and calibrate it there.
Don't worry about setting the joystick up or trying to calibrate it within the MAC OS itself, as X-Plane 11 should do all of this for you.
Furthermore, if you get any device drivers with the new T16000M joystick, then don't use these either, as again, X-Plane should take care of everything once you plug it in and open the application.