Where can I get the Halo 2 demo for mac?

where and how can i get it? I have halo 1 and i got it off the official gamespy site but idk how to get the halo 2 demo... I saw that my friend had @ school and he didn't tell me how he got it becasue it was from his cousin...

I'd appreciate help (links and download sites)

Halo 2 is only for Windows Vista.

To run it on a Mac you'd need a pirated (illegal) copy and emulation software.