There is another Mac-capable qualitative analysis tool that can be used for processing text data. It's called HyperResearch. Works like the others, nVivo, AtlasTi, TAMs Analyzer. It's a bit pricey, but not as pricey as AtlasTI (PC). And you can try it out for free with a limited number of cases and codes.
I'm also working a bit with Discovertext. It's cool because it can ingest RSS feeds from blog posts and forums, text-based documents, Twitter feeds and even YouTube comments. And, because it's a web-based tool you can use from any platform and browser.
I'll stick some of these links in a list in the discussion space that has been set aside by Janet for resources.