Apple could not program their way out of a paper bag to make a modern day OS as Mac OS9 failed and Copeland was vaporware and a big failure. They had to buy out Next to get Steve Jobs back and base the OS on Unix and open source projects.<p>What is known as Apple now is basically what Next used to be the old Apple is dead and the new Apple is based on Next. Steve Jobs canceled all of the projects that lost money, and made new projects that earned more money that the ones that got canceled.<p>Darwin is the open source part of OSX, the GUI is not a part of it. Apple uses open source code and the community to save money on R&amp;D of the OS.