I am having a great deal of difficulty in working out how to load then display a basic Xib. I have used source file from a book I purchased (Apress: Learn Cocoa on the Mac) and when running this code all does what it is meant to do. I try and duplicate this myself and for the life of me I can't get it to work and I am sure I have the exact same code - so I am guessing it could be a XCode setting preventing it. I have attached the code (Demo.zip) id anyone cares to take a look - it is pretty basic so it won't be difficult to follow what I am trying to achieve. Don't worry about the WindowTwo.xib as I can't even get WindowOne to work. Good Luck. Fritzables.