TiberiunSun69

I downloaded the game and want to play tiberius sun skirmish, not even online. The game will shut off with some type of error after the terminal box pops up. The screen will go black and I have to restart my computer. I am playing on a macbook pro OS X Yosemite. I would really appreciate any help. I love Tiberiun Sun and really want to play it. Thank you computer processor: 2.4 GHz Intel Core i5