Hello all,
Although I have never actually tested this version of Train Simulator, I have gotten Train Simulator 2013 to run on my Mac. For this reason, I recommend that anyone who is trying to run this version of the game to seek this application: Railworks 4: Train Simulator 2013, were you will find a wealth of information on how to run that version of the game. I am fairly certain that the steps to making that version run will also make this version run. If anyone has any information or questions, do not hesitate to contact me. I am more than willing to help.
Cheers,
Gavin Jacobs