How do I learn to code in HTML and CSS on my Mac? Web design is one of the most useful skills you can learn, and it’s easy to learn HTML and CSS (the two main pillars of web pages) in Mac OS X.

First, you'll learn how to code in HTML, which is awesomely geeky. Then you'll move on to code-editing features and learn how to style your pages using CSS. Finally, you'll learn some more advanced ...