auf dem Mac braucht das Spiel länger zum starten. Beim ersten Start kann es durchaus 15 bis 30 Minuten dauern. (Weitere Starts brauchen ca. 5 Minuten).
Einfach Mal starten und abwarten.
Just tried it. Had also the screen for a real long time. Then I want go some coffe, talked with friends... maybe 5 - 10 minutes. Came back, still was there, then minimized, done some other things. Maximized it again, and it was loaded.
So just seems to take an insane amount until it's loaded.
Edit: Tried it again, it now takes about 3 - 4 minutes to load (on a SSD). On a HDD it could be even worse