No wonder it whines and cries. It's a Mac. I'm surprised it wasn't doing that originally.
It wasn't. The first time I played through Portal, it handled it wonderfully. But a 2 GB RAM limit and 100 Gig hard drive tarts to show its limitations after seven good, solid years....
When you say upgrade, do you mean a better Mac? Seriously, just get a custom built desktop PC. They're thousands of dollars cheaper and much better anyway.
Erm... no. For starters, I need portability, so that rules out the desktop (I could just use my wife's Mac if I wanted tower power... and she's got some power there, believe me). Secondly, I despise Micro$oft and their shoddy products and business practices, so I refuse to buy their products merely as a matter of principal.
Also, Macs are just fine for gaming machines. Sure, software selections may be more limited... but that simply means less trash to wade through to find some real gems.