I read somewhere that I should reduce the threads and that is actually working really well so far. Hasn't crashed again yet

I've been having this same problem but with a ~70% fail rate. Im on 0.12.20 and the max threads were at 4. I just changed it to 1 thread and it worked the first try. If this doesn't fix it Ill let you know and try the update.

Hmm, don't know anything about OS X, but... maybe go through the list of installed applications, find something with "terminal" in its name or description. Then figure out which binary to run, right click -> properties on the desktop icon or whatever you start Factorio with usually might ...

prg wrote:Could you try running Factorio in a terminal and see if that outputs anything interesting?

I would if I knew how. It's just weird that sometimes it works and sometimes it doesn't, with no real pattern.

prg wrote:So what about that log file the error message mentions?

I can't find it. I look in the Application Support it says to look in, and it isn't there. Wherever it is, it isn't where it says it is.

Around half the time when I load my last game after just opening the game, I get a popup message "Error. Unexpected error occurred" and I have to force quit Factorio and try again. Sometime it happens 4-5 times in a row, and sometime I can get in on the first try. If I click out of the pop...