I can add that the Mac API needs a little bit of polishing now. I just went back to develop a Mac application (for internal use) after developing on the iPhone,

I can add that the Mac API needs a little bit of polishing now. I just went back to develop a Mac application (for internal use) after developing on the iPhone, and certain things are not that intuitive or easy to use as on the iPhone. Is not really a big difference, but Mac API could use a little more consistency learned from the iPhone API.