This is my list of the best Macintosh HTML editors in order. I evaluated over 50 Macintosh HTML editors in 30 categories, and these are the editors that I think are the best of the best. If you're looking for an HTML editor for Macintosh, you should find one that meets your needs on this list. Find the perfect HTML editor for you.
Amaya is the W3C Web editor. It also acts as a Web browser. It validates the HTML as you write it, and since it defaults to showing you the tree structure of your Web documents, it can be very useful for learning to understand the DOM and how your documents look in the document tree. It has a lot of features that most Web designers won't ever use, but if you're worried about standards and you want to be 100% sure that your pages work with the W3C standards, this is a great editor to use.
BBEdit is one of the most popular Web editors for the Macintosh. It is easy to use and has a lot of great features. It's a text editor, so if you need WYSIWYG it won't work well for you, but if you're looking for a powerful text HTML editor, you need look no further.
SeaMonkey is the Mozilla project all-in-one Internet application suite. It includes a Web browser, email and newsgroup client, IRC chat client, and composer - the Web page editor. One of the nice things about using SeaMonkey is that you have the browser built-in already so testing is a breeze. Plus it's a free WYSIWYG editor with an embedded FTP to publish your Web pages.
skEdit is a great text editor for Macintosh. One of the things I appreciate about skEdit is that it's a lifetime purchase. Once you pay the nominal fee, upgrades are free for life.
Style Master takes a different approach to Web page design. Instead of focusing on the HTML, it focuses on the CSS - so that you can work on the design of your sites in an intuitive way. I've found that many Web sites have much more complicated CSS than HTML code, so this is a great program to use to untangle the mess.
Coda has a lot of features and functions that combine together to make a great Web page editor. It uses Transmit to transfer files, has a built in terminal and DOM inspector, and many of the features you expect of a text Web editor. I'm not sure if it has extended search and replace, but it does use regular expressions in a fairly understandable way to do complex searches on your pages.
Arachnophilia is not free - it's "careware", but just because you don't have to pay cash for it doesn't mean it's not a good product. In fact, it's a great text HTML editor with a lot of functionality. The color coding makes it easy to use. It may or may not work on Mac and Unix. Feature highlights: Color coded XHTML editing.
Komodo IDE is a great tool for developers who are building more than just Web pages. It has support for a wide variety of languages including Ruby, Rails, PHP, and more. If you're building Ajax Web applications, you should take a look at this IDE.
EditiX is a great XML editor. You can use it to write valid XHTML documents, but it's major strength is in the XML and XSLT functionality.
NetBeans IDE is a Java IDE that can help you build robust Web applications. Like most IDEs it has a steep learning curve because they don't often work in the same way that Web editors do. But once you get used to it you'll be hooked.
Do you have a Web editor that you absolutely love or positively hate? Write a review of your HTML editor and let others know which editor you think is the best.