Thanks for the response. It's my desktop. I downloaded my second license to my macpro laptop and it runs great. Just a heads up, you can't upgrade your graphics drivers on a mac without upgrading the OS. I run Snow Leopard and the current OS is Mountain Lion. This could be the problem for the desk t...

First, let me say how happy I am that I can play TBCB on my Mac. Been playing the game since the board version came out but bought a Mac a few years ago and I missed playing this simulation. I'm able to play the game, have created my own organization, and currently running simulations through auto s...