Nice game, but frequently crashes

As the game progresses, it frequently crashes. If you open the game back up immediately, resume the game and it crashes again, it often causes the system to lock up and crash. And it is not as though the game is being played on an inferior system. Im using a 3.4 GHz Core i7 iMac with 16GB of RAM. It is fun to play and offers a variety of scenarios, but the play experience is significantly hampered by the crashes.

txcraig75 about Sid Meier's Railroads!