Originally posted by wahid_satu I've never tried it on mac but on linux and windows, Rawtherapee never failed to render dngs from newer Pentax dslrs, including the k-3. You might need to spend a little time learning it though, as documentation is not the best.
Are you saying that you have opened K-3 DNGs with Rawtherapee? If so, that's great news.
EDIT: To answer my own question, I just downloaded a DNG file that had been posted on the web, and yes, Rawtherapee opens it without any difficulty. It does a great job with the colors. Nice!!