Thanks guys for all the hard work. As one of the few Mac users, not using Wine or Bootcamp, I can confirm that it appears NAM 31.1 works great, with the exception of the Bridges Plug In. By not working, I mean you can use it to build the required bridges, but only when the game is paused. If you start the clock it freezes. I have solved the problem by simply removing the controller. I'm still able to use the bridges I've built, I just need to add the plug in back to build new ones. Everything else is perfect, and this is only a minor issue, so kudos, especially for a platform you guys don't really support.