Shiva, I have no idea what you are saying...
When Bungie was demoing their game engine, they were running a prototype of the game engine on Mac G4 systems; what they showed was, to all intents and purposes, the equivalent of an AH film being run back through the FE. This let them show off the rendering speed and graphics quality. Concurrently with the Mac version, but about one development stage behind, was the PC version.
Microsoft bought Bungie outright. Immediately after the purchase, development was halted on both the Mac and PC versions, and everything was put behind producing the Xbox version of Halo. In various interviews with online game sites, several of the developers have stated that, because of the similarities between the code base for the Xbox and the PC, producing a PC version of the game would require, at most, a couple weeks of code changes -- yet the PC version of Halo isn't due out until next summer. Microsoft gutted the development of Halo for the PC and Mac at
all in order to use it as the flagship game for the Xbox. After all, who would buy an Xbox to play a game that they could play on the computer they already had?
