I'm not sure that what you are saying is incompatible with what is written in the article.

Note that "stole" is in quotes.

Delaying Halo for the Mac deflated Jobs' claim that gaming was coming back to the Mac platform.

I'm not saying they believe that Microsoft stole Halo. Their premise is that Halo would have been a success launching on Apple. That Bungie, with Halo, single handedly caused the success of the XBox. And that it alone could have caused Mac OS to become a gaming juggernaut. When in reality, Bungie desperately needed help and Microsoft recognized the value of launching Halo on the XBox. That symbiosis was needed for the success of both things.

The incompatibility is that the author clearly doesn't understand why the Halo succeeded. Microsoft has historically bolstered game and hardware developers in a way Apple has never been willing to. Their purchase of Bungie is only one example of that.

Apple would not have provided any of the support in the partnership that Bungie needed to complete the game. Their alternate universe is flawed because without the purchase of Bungie there is no Halo.

Halo was going to be on PC too. It would have done very little to help Mac OS anyways.