Much to my displeasure I learned this morning that Apple's 9.0 installer refuses to install the AltiVec extensions if it detects an off-brand G4 update (like my newertech MAXpowr G4). Fortunately I also learned that Apple's own Tome Viewer is a can opener for their installers and bypasses this nonsense, extracting the four necessary extensions. However, the improvement in rendering time is not colossal: 468 seconds instead of 476, or 1.7% faster. I'd like to go back and create some extension sets that eliminate most of the stuff Poser isn't using and report again.