Dunno if this really helped or if I was just lucky. The following was successful four times in my case and maybe it helps you too:
After a crash I restarted the game and exited it directly from main menu without continuing a previous game or starting a new one.
Back to the desktop I restart the game again and continue my safe game. As a result I am able to play some hours without a crash.
Same Problem here.
Playing with a Macbook Air 11" (Mid 2013). The game runs in steam.
First I had the problem only from time to time. Now, after playing 20-30 hours and after installing patch 1.03 it occurs every time I am venturing forth. It's nearly unplayable.
Dear support, please help!