Converting a basic Cocoa application to a document-based application

Question

My team and I have been working on an existing, non-document-based Cocoa application. This is our first Cocoa app, although we\'ve done a number of iOS apps thus far.

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Answer 1

Everything @Hans' answer provides is correct, but the final change that is needed is totally, stupidly trivial, but adds a nontrivial amount of functionality that comes with document-based apps:

In the Main.storyboard file, the document element has an extra property that needs to be deleted: initialViewController="XXX-XX-XXX".

It is probably the last thing on second line. Remove this, and the Save… menu option, along with a few other menu options, will properly be enabled by default, and the app will properly recognize the document object upon launch.