I've been reading my library of books, searching online via google extensively, going over archives, going through my bookmarks, but I still don't know how to save a simple text files, then open it again with my application. For learning purposes I have a bare bones document based cocoa app, where the gui is simply a text field. I want to be able to save that text field to a .txt file. But the problem is, I can't find the right tutorial/example for me. Apple's documentation explains WHAT core data is but not how to use it. Online stuff I was able to follow, only to find out at compile time that it's too old of a version and doesn't work. And I'm not far enough in my book yet to do the chapter there. Can anyone help? I'm looking for the simplest example ever, that I can then go over minutely and examine and learn from and ask questions about. Thanks!