I see... I'm not sure but I think one of the problems that might cause lagging is, as you know, the lack of RAM. However my MacBook Pro has a 16G RAM and it is enough even for some mid-quality simulator.... I have to admit that MacBooks are not for gaming.... Perhaps but I will try to reduce the AI and the graphic so there are less thing the computer have to load. But still, I don't know much about computer so.... looking forward to any update that might reduce the issue! :)