Ultimate Fix not Working, "No game disc found"

Hi,

I had downloaded the base game from another site & didn't have any expansions. I wanted to download Generations & downloaded the guide from this website. After updating my base game, it started saying the "No game disc found" error. I downloaded Generations and the Ultimate Fix. After installing Generations, I tried to use the Ultimate Fix. Maybe I didn't "extract" it correctly since I have a Mac. But it's still giving me the "No game disc found" error. How can I fix this?? Any help is much appreciated.

Thank you.