Moin,
I also have a Mac and use 2 Airbus TCA Quadrants with the two addons on this one.
During the necessary calibration, you must make sure that you move the thrust levers right around.
During operation, my experience is to move all switches and levers once over their complete length of movement after each start of the FS 4, so that everything is correctly synchronised.
If you may find the fine-tuning of certain lever positions not exactly enough, you can correct this in the gc-map.mcf (text file), but it is a little tricky.