I remember my work colleague having an early access release because he is quite connected.
It was beautiful and we couldn’t believe that a Mac could do something like that back in the day.
Microsoft saw it jumped on it and straight away extinguished the Mac version and ported it over to the Xbox.
The Mac version was absolutely canned. They did not want gaming competition from Apple in any way, especially something as impressive as Halo 1 was back then.