Reading through the XCode documentation, it says "If you’re new to iOS or Mac programming, work through Start Developing iOS Apps (Swift) or Start Developing Mac Apps Today." - I found the iOS guide, but 'Start Developing Mac Apps Today' seems to have been deleted from the developer library - are there any guides for those of us wanting an overview / guide for mac development?
That one has certainly gone missing - have you check iTunes U in the store?
And did you go thru this pdf yet?