Computer died while hosting multiplayer game

[NiceGuy82]

I have a Macbook Pro (2013). Playing a local network game where I was the host and my computer just eventually died. The charge couldn't keep up with the cost of running the game. So I have a few questions,

a) Any to configure the game so that it costs less?
b) Is the solution to set up a pit boss dedicated game so my computer isn't responsible for both playing and being the host server?
c) Can I do that on a mac?

Thanks guys!

 

[NiceGuy82]

So doesn't look like this is an issue with me being a host. If I run a single player game the same thing happens. CPU percentage well over 100%, close to 170, sometimes in the 200s.

I've attached my specs. Why can't my computer run this game?