After first setting my graphics to medium and making sure Post Processing Effects and Specular Lighting were turned off, I kept crashing after completing Big Battles. However, I changed the permissions as you mentioned yesterday and was able to complete 4 big battles and play for several hours without a crash.
Originally Posted by Valamar
This morning I've set my graphics back to where I want and I'll check to see how BB's react.
[color=red]Mac Player[/color] 15" rMBP - 8GB RAM - 500 GB SSD - 1GB GT 650M - Mac OS X 10.9.3