Building websites on Mac OS X provides a completely different landscape in comparison to Windows or Linux. The applications are designed much differently and built from a different standard of programmers. Not to mention the enormous Mac App Store which offers immediate downloads for software you can purchase right away.
In this collection I am focusing on the 20 most useful OS X apps worth downloading for web design/development purposes. You will obviously not need every application listed, but it is worth taking a peek at each piece of software to determine if you can use it during your workflow. If we missed any great Mac applications feel free to share your ideas in the post discussion area.