How can I change the mouse sensitivity for X-wing 1994 under MacOSX?

I tried adding "sensitivity=1000" under "[sdl]" in the configuration files, as well as changing "mouse sensitivity" in the plists and the user defaults without any success.

Any idea?

I think mouse sensetivity only goes to 100 so keep it below that.

Don't change mouse sensitivity in the game itself, do it through GoG's Dosbox configuration settings file (you can find this in the game's directory if you have the GoG version.) Doing it that way lets you go way beyond 100. I'm currently playing with it set at 200 and it feels pretty good (though I am anxiously awaiting the arrival of my new flight stick from Amazon.)