I also have tried to find it, but no luck. Reading the google results I can say that one of this libraries(libGLESv2.dylib) can be built from source code of Mesa and it will work in software mode. Also you can try to use iOS OpenGLES.framework(it work in software mode) which ships with iOS simulator. Anyway, developing OpenGL ES projects under MacOS X/iOS little bit harder, because this OS'es wants EAGLContext via Cocoa, which wants Objective-Pascal and so on