Dreamweaver like editor

It is not free but Coda is a good option, looks good and works well.

 

You do realize Dreamweaver isn't free, and it is available for Mac, right?

Here's a page with a bunch of reviews of mac html editors:

http://webdesign.about.com/od/htmleditors/tp/aatp_frehtedmac.-0cZ.htm

 

The Best Free HTML Editor

I have a Macbook and I use Aptana Studio.

It is just like Dreamweaver.
Once you start writing <s it gives you a list full of choices such as <script> or <style>.

And once you write <script> it automatically writes the </script>

Note: I am only using those as examples.

And Aptana Studio has a very nice interface, it has built in preview so you don't have to open a browser to see your stuff, and it shows your errors at the bottom of the app.

You can also get hundreds of plugins such as Ajax, PHP, Ruby on Rails, Pydev, FTP, and many more.

JUST GET IT AND TRY IT, You won't regret it, I swear!

Download at: http://aptana.com/studio