Mac Game restarts/crashes my Macbook Air

Hi, I really need some help! The game will restart my Macbook Air without fail at some point (the screen says something like your computer restarted because of a problem) but when I try playing the file on my friend's PC, it works fine, it's just on my laptop. I have tried doing reinstalls, making new save files, using compatibility mode, etc. I am on 1.5 version, no mods and this is on single player but also happens on another file on multi-player. Please please help I am so in love with this game and I probably wouldn't start a new file any time soon so I really want to save this one!

Thank you