I prefer Mac for pretty much everything, including development, but the one thing I miss from Windows is the Delphi IDE. That was by far the best IDE I've ever used and I've found nothing to replace it. It entered the necessary code automatically for the interface elements and if you double-click a user interface element it makes an event handler automatically and takes you there straight away. I've found nothing anywhere near as easy on the Mac. That said, the Mac's libraries are a lot better. If Turbo Delphi could be ported to the Mac then I'd rejoice