Getting Started with launchd. Cocoa Frameworks Cocoa is an extremely productive high-level programming environment that gives you complete access to the full power of the operating system, including the signature Mac look and feel.
Written in the dynamic Objective-C language, Cocoa provides exciting and animation-rich user experiences, but is easy to augment with your custom behaviors. With integrated support for the Model-View-Controller pattern, Cocoa provides a solid foundation for building state-of-the-art applications. Overview of OS X launchd. Back in early November of 2003, I introduced my Mac OS X 10.3 Panther review with some concerns about Apple's OS release cycle.
It's strange to have gone from years of uncertainty and vaporware to a steady annual supply of major new operating system releases from Apple. But do I really want to pay US$129 every year for the next version of Mac OS X? Worse, do I really want to deal with the inevitable upgrade hassles and 10.x.0 release bugs every single year?