If you’re looking for the book from O’Reilly, see BookLearningCocoa

If you’re HavingTroubleLearningCocoa, see that page, or CocoaIntroduction or HowToProgramInOSX

If you’re looking for RecentTutorials here at this site, well, there you are.

Many of the introductory pages listed above lead you to CocoaTutorials posted elsewhere on the net.