First we need to open XCode. I'm using the XCode 12 beta so yours may look a bit different.
Our application itself is mostly contained in the ContentView.swift file. This includes a
PreviewProvider (kind of like a built-in storybook) as well as
Text with the default padding.
If we click resume on the preview pane, we see the preview show us our ContentView
MyFirstMacAppApp.swift, bootstraps our app with a Scene.
After clicking the play button and running the application, we can see that we have a window with some text and padding.