Start Developing Mac Apps Today

https://developer.apple.com/library/mac/#referencelibrary/GettingStarted/RoadMapOSX/chapters/01_Introduction.html


Your First Mac App

https://developer.apple.com/library/mac/#referencelibrary/GettingStarted/RoadMapOSX/books/RM_YourFirstApp_Mac/Articles/Introduction.html