http://www.macnn.com/articles/01/05/16/snes9x.1.3.7/
SNES9X 1.3.7 improves OS X performance
updated 05:40 pm EDT, Wed May 16, 2001
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SNES9x 1.3.7, the popular SNES emulator for the Mac from John Stiles, includes a number of performance enhancements and optimizations when running under Mac OS X 10.0.2 or later. The new version also adds a Cheat Finder, an option to control the freeze/defrost panel from a gamepad, a new sound decoding system, and an altered RAVE Smooth mode that is more compatible but may provide slower framerates on some systems.
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"Slower Framerates"
In my experience running this on a variety of games, the framerates dropped 50-80%, regardless of RAVE or not, SuperFX or not. This was done with the same settings.
On a Powerbook G3 (FireWire) @ 400Mhz, Yoshi's Island dropped from 25 to 7fps, and Final Fantasy 3 from 45 to 20fps.
Avoid this update and stick with 1.3.2 (unless G4's can speed it up a heck of a lot).
- Joshua Ochs