After figuring out how to run Xcode this morning, I have completed my first ever Objective-C Cocoa App. Now most people say "Hello, World!" or other such hackneyed stuff.
I thought I might try something with a dash more pizazz. The left-hand button uppercases the input text. The right-hand button lowercases the input text. Here's my first test of this staggeringly good new program: