Hey hey! Sorry my reply is so slow >.< I was away from home this past week, so I'm only just reading comments that I missed. Hopefully, you managed to get it working, but if not, I hope I'll be able to help :3 Is it the Mac version you're trying to play? Or is it the Windows or Linux version? If it's Mac, there are a few things you can try which are listed here :3
I don't own a Mac myself, but everything on the list is something that has worked for other Mac users in the past. I hope you manage to get it working :3