The first public beta of Q3Test was released on MacOS first: https://web.archive.org/web/20000229083216/http://macweek.zd...
It wasn’t the final full featured release of Quake III though. And as stated in Carmacks .plan it was because these gaming communities were so tiny so I’m not sure this is a strong argument for the macs viability as a gaming platform, which was the context of this thread.
I guess in a technical way that counts as a very brief Mac exclusive..
“MacOS still sucks” lol
http://fabiensanglard.net/fd_proxy/doom3/pdfs/johnc-plan_199...