How can I view (offline) the full English Wikipedia on OS X?
It's not clear how you want to use the data once it's on your mac.

To narrow this down a bit, you can refer to the page that wikipedia has made to guide people like you that want to get a local copy of content and actually use it.


http://en.wikipedia.org/wiki/Wikipedia:Database_download


Pay particular attention to the sections:


Help importing dumps into MySQL
Static HTML tree dumps
Dynamic HTML generation from a local XML database dump


The first option has you loading the dumps into your own database and is the most powerful, but means you will be running your own web server / database - your own little copy of wikipedia on your mac. The second two are guides to simply opening the dumped files in a web browser or other program that can render HTML and follow the links to files that rest on your mac's file system.