Is there an easy way to use UAE on OS X?

[Forcie]

There is a GUI for it, if that's what you mean.

http://www.pimley.net/projects/#hi-toro

E-UAE for OS X is quite bad performance-wise though. Remember that you only get "full" performance from it when in fullscreen mode (F11-S). Windowed mode is horribly slow. But even fullscreen mode is very slow compared to WinUAE on the same hardware.