I would like some software or web service that can help me make infographics from my interview data. I am using a Mac, can you suggest anything?
I don't think any tool will turn interview _data_ into infographics, as you need to do the analysis yourself, but if you have _information_ you want to turn into infographics, there's an excellent makeuseof article listing ten tools for the job:http://www.makeuseof.com/tag/awesome-free-tools-infographics/.
After a cursory look, this article seems pretty in depth on the do's and don'ts. though, I'm not sure this is what you need, I think it might be...
Or you could try a Google search for this: "infographics to report qualitative data".