Here are some Quake items regarding ATI video cards, RAGE II, RAVE, G3 Macs and PowerBook 1400s - with a dab of RAM Doubler thrown in (some of these items my be relevant to the ATI issue just mentioned):
a. New Quake drivers MacSoft has released new Quake drivers for ATI video cards.
b. G3 Macs Reader Chris writes that, after getting a G3 mini-tower, "one of the things I was really excited about seeing was what the new Rage II chipset would do with Quake. Well it was abysmal. The screen only moves at 2-3 fps and the sound cuts out constantly."
Benjamin Reed-Lunn similarly writes that when he tried the RAVE Quake with his G3 Mac, he ran "horribly." Other versions of Quake ran fine, except that he got no sound when RAM Doubler 2.0.2 was active. He did not have this problem on his 6100.
See a previous MacFixIt item for more on the subject of Rage and Quake.
c. PowerBook 1400 From Mike Weinstein of The Daily Mac: Quake has a problem with the PowerBook 1400. Whenever you launch Quake, it freezes at the point where it says "Loading all sounds as 8 bit" and/or "Sounds Initializing." Mike then got a tip that if you change the sound output quality from 22.050 KHz to 44.100 KHz (via either Monitors & Sound or Sound control panel), the problem is solved.