Trust me, Game Porting Toolkit is worth it. 180 FPS in BeamNG.drive (for example):

* Attempt 1, right after WWDC keynote: https://www.reddit.com/r/BeamNG/comments/143if32/it_works_be...

* Attempt 2, right after the release candidate was published: https://www.reddit.com/r/BeamNG/comments/16iioxj/back_at_it_...