thanks for your reply but I don't understand why irrlicht source and the examples compiled (and work) fine into xcode while if i try to complie a single example into a new project, it compile well but it doesn't run.
I've set i386 architecture into project setting and also into target properties and i've also included the frameworks required ( cocoa, carbon, opengl and iokit ) and also the libirrlicht.a .
At this point i don't know what can i do more.