PC to MAC Unity Project Crashing

Hello!!

I 'm running Unity Pro 4 trial version on Mac 10.7.5.
Even though Unity projects work just fine, once I tried loading a project made by my colleague on PC (also Pro trial) it just crushes.

The project opens normally, goes in play mode (and back) just fine, but once I try manipulating stuff, or even zooming in-out (non-play mode), Unity crashes.

Everything seems normal up to that point apart from the fact that I can see a slight frame lag when zooming to game objects etc…

Any thoughts??

Many thanks in advance.

Anything useful/helpful in the log?

Just so you know you are not alone on this, just got a Mac Mini so can test our projects and the same thing, can load a project can run it once then thats it Unity just locks up with the spinning color wheel. Can only ever do one thing, ie run or build before the next thing will lock it up. Logs have nothing of any use in them.