Campaign Mode Crash - Large Fleets - Offense - MAC OSX 10.6

Hello,

In campaign mode, when I attack an enemy planet with what seems to be large fleets (more than about 35 ships or 30k+ HP), the game crashes.

However, if I wait until a fleet attacks me, things seem fine. This does not happen in other modes.

This makes the game unplayable due to the fact that I need to kill massive fleets with more than 35 ships in order to survive (some enemies have 100+ units).

I don’t even know how I’d go about diagnosing the root of the problem. Can someone help?