I bought a new Macbook Pro and got it up and running. Funny how I've been using Mac's for a while now but never owned one myself. A computer is a computer.
I've been playing around with the Motor2 physics engine. I'm working on some games using it right now. I'll post and follow up when they're ready.
For now check out this new Flash port of the Box2D engine by Eric Catto here:
I suggest reading the code and using the original Box2D documentation: