A couple years ago I bought a Logitech gamepad that happened to use Xbox protocol (I didn't read the label well enough, I just saw the name brand). I tried to use this Xbox360Controller driver but it didn't recognize my gamepad. So, I fixed the driver to work.
When Mountain Lion came out I had to update the driver, which had undergone some 32bit -> 64bit change but also added in some other garbage about Xbox chat pads that was breaking when I tried to use it with my Logitech game pad. I don't remember if it kernel panicked or just didn't work. Certainly I caused a kernel panic or two while tinkering with the driver. But I got it working again, mostly by commenting out stuff I didn't want.
When Mountain Lion came out I had to update the driver, which had undergone some 32bit -> 64bit change but also added in some other garbage about Xbox chat pads that was breaking when I tried to use it with my Logitech game pad. I don't remember if it kernel panicked or just didn't work. Certainly I caused a kernel panic or two while tinkering with the driver. But I got it working again, mostly by commenting out stuff I didn't want.