SNES9X is an SNES emulator based on the SNES9X C++ core, and John Stiles' port of the same. It is largely the same as Stiles' version, but boasts some new features worth checking out.
What's New
Version 1.53:
* Fixed the issue that loading a savestate fails in games that use custom chips.
Requirements
PPC / Intel, Mac OS X 10.3.9 or later.
Download here