I'm teaching myself Mac OS X programming, and have decided to write all new Mac code in Objective-C using Cocoa. However, I have a very large library of C++ classes that I do not want to port to ...

Also, as it's a common misconception: Objective-C and Cocoa are not what you "need" to know to write OS X applications using the Cocoa toolkit. Mono, for example, includes the Cocoa# bindings (and ...