The doors still shut for me too just as fast. Guess its time to upgrade.
how much of a difference was it with and without the mod? I had set the doors to close 99 seconds after you reach each trigger so it should still work though.
I could disable the generators and I'm on an Intel HD4000 integrated graphics card. Maybe my cpu is good enough to not be low end though. (mid 2012 13" macbook pro)
HD4000 should be alright. Its anything lower than that like a 9400m (late 2009 Macbook) where issues come in.