[2020] Game Crashing After 5 - 10 minutes of playtime (Mac)

The game is not supported on Intel video systems on MacOS. But that wouldn't usually cause crashes, just slowness.

What temperatures do you see for the GPU and CU in the main game menu? After say 5 minutes of play? I use Macs Fan Control to read temps but there are other apps of course.  

Well there you go - that's definitely the problem here! Anything over 80c is a worry. You'll need to get the machine cleaned out.

This happened to both my wife and I this year, we had to take our iMacs to a shop to get cleaned out - dropped the temps by like 20c!