crashing often since 4.2.0 PTB released

my game has been crashing since i tried out the ptb. it crashed twice during the ptb and i assumed it was just the ptb being faulty, but after switching back to the release build, my game still continues to crash. from what ive seen, theres nothing specifically that causes it to crash, though most of the time is happens after a key moment, like a survivor being downed, or me finding a survivor and starting a chase. other times itll crash before i even get into the game, or during the middle of a chase. this honestly might be an issue with just specs, since i play on a 2017 macbook pro, which has an iris 640 integrated intel gpu, so i wouldnt be surprised if the ptb just pushed the game past the limit to which im able to play, but if it isnt, id appreciate if this got looked into, so i can continue enjoying this great game :) thank you!