Just bought Amiga Forever and Have an iBook G4 and I've gotten myself turned around in all sorts of

[Doobrey]

Grab OSX build of E-UAE 0.8.28 from Rich's EUAE site which is more upto date than MaxUAE
..it also needs the libSDL framework installed, libSDL 1.29.dmg
Finally, get the Hi-Toro GUI for configuring and starting E-UAE.

Pretty much all the guides for setting up WinUAE/AmigaForever apply to E-UAE, except that the JIT settings can be ignored since it's not in the OSX version (even though Hi-Toro has options for it!)