In relation to my thread about how to make an .app package, I've made a build target for creating an Irrlicht framework for MacOS X.
I was surprised not to find a build target for a framework in the xcode project, so I made one.
Compiling for a framework will allow developers to drag it into an .app and not make an installer. I haven't tested it with a working .app yet, but it compiles both release and debug.