MacFCEU v0.5.1 is released. MacFCEU is a Mac OS X port of FCE Ultra. A Mac OS-specific port of FCE Ultra 0.98.13 - an NES/Famicon emulator. Classic and Carbon are supported exclusively.

MacFCEU v0.5.1 Changelog:
Bug fixes, optimizations.
Removed some more redundant stuff.
Fewer extern´s.
The PPU part of tile view is now in color (with customizable colors!).
Debugger: added step-over (useful for JSRs), echo.
FPS estimation now takes 10 frames instead of 5 before.

Download: MacFCEU v0.5.1
Source:Here