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.

Traditionally, graphic designers create a website’s template, and programmers build coding (HTML, CSS) to add pages, sub-pages, and features to it.

HTML provides the structure, content and layout, CSS adds style and design, and JavaScript adds functionality and interactivity.

Add a short CSS class to an HTML Web page to use animated and stationary GIF images as the page's background.