Problem with Europa Universalis 4

[Samimuhammad]

Hello guys,
I have a problem with EU 4. When I start the game it automatically crash. What should I do ? I have a macbook air 13. I played a lot at EU 4 so i don't understand why it keep crashing like that

 

[AndrewT]

Please register your games here then post this in the EU4 Tech Support forum. Thanks.