Cocoa has one of the most distinguished pedigrees of any object-oriented development environment. From its introduction as NeXTSTEP in 1989 to the present day, it has been continually refined and tested (see “A Bit of History”). Its elegant and powerful design is ideally suited for the rapid development of software of all kinds, not only applications but command-line tools, plug-ins, and various types of bundles. Cocoa gives your application much of its behavior and appearance “for free,” freeing up more of your time to work on those features that are distinctive. (For details on what Cocoa offers, see “Features of a Cocoa Application.”)
Documentación de desarrollador de Apple.
Nota: Cómo se pasan los de Apple