Jeena has decided to drop Apple Mac OS X and switched full time to GNU/Linux. He has documented his experienced in a blog post.
From the blog post:
I was mostly using free software on OS X already like Firefox, LibreOffice, Emacs, but it still took some work to find out what would work for each and every use case I had working on OS X. Therefor here a list of what I used back then and what I use now: