probably and most likely never. (maybe it happens if nvidia decides to release the source/documentation for their drivers/cards, but then it still wont be 100%:)
so you better get a supported card for your mac (r7500-9250, or r9500-9800 with no 3d support) or flash a card for the pc with mac bios (cheaper but more difficult indeed:)
[ Edited by sadddam on 2010/10/15 0:40 ]
DEAD pegII/G4@1000.1gb ram.radeon 9200pro
240 gigz hd.nec dvdrw.MorphOS 2.4 DEAD
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amiga1200T.blizzardppc@180/040@25.96megz ram
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zx.spectrum@3.5