This site is being deprecated.
Please see the official X‑Plane Support page for help.
Hm, I also use X-Plane on Mac, and mostly with a mouse, but haven't seen such sensitivity with the controls. There is a known issue when using a track pad with force touch active. Try turning that off and maybe only using the Logitech mouse (in case having two inputs for "mouse" is messing up X-Plane's controls).
This site is no longer being actively maintained.