Ok so I think I figured out how to fix the graphics issue. I'll be nice and share it with people.
1. Go to ur applications folder and find Halo
2. Move it to the trash
3. Go to ur Documents folder and find the Halo folder
4. Move it to the trash
5. Empty the trash
6. Insert ur Halo CD and double click on it and select "Halo.pkg"
7. Follow the instructions to install Halo
8. BEFORE YOU DOWNLOAD THE 2.03 UPDATE, u need to go to ur applications folder and find Halo
9. Right click on it and select "Show Package Contents" and open "Contents"
10. COPY (do not move) the folder called "MacOS" in the "Contents" folder to ur desktop
11. Go here:
http://www.apple.com/downloads/macosx/games/demos_updates/halocombatevolved.html and download the 2.03 update
12. Install the update
13. Go to ur apps folder and find Halo and right click it and select "Show Package Contents"
14. Now drag the MacOS folder thats on ur desktop into the "Contents" folder and click "replace"
15. Open Halo and play with dope graphics!!!
You won't hafta type in ur cd key because u didn't delete the Halo prefs that save ur CD Key
I hope this helped...it worked for me...any questions feel free to email me @
tman444z@gmail.com