hey i'm hoping somone can help me i'm havin problems with my mac , its not playin a sims 3 game i just brought ,i have several others sims 3 games on my mac already but now they're discs arent workin either. when i put the discs in they try and load then the mac just gives up and ejects it, but if i put any other disc in it works fine its just sims games please help i dont no who to ask and im not that good with computers