Learn Cocoa on the Mac

The Cocoa frameworks are some of the most powerful frameworks for creating native desktop applications available on any platform today, and Apple gives them away, along with the Xcode development environment, for free! However, for a first-time Mac developer, just firing up Xcode and starting to browse the documentation can be a daunting task. The Objective-C class reference documentation alone would fill thousands of printed pages, not to mention all the other tutorials and guides included...