Mac users interested in Rawtherapee 4.2 mac 10.5 generally download:
RawTherapee is a RAW photo post-production tool designed for professional and beginner photographers. With its help, you can manipulate and convert your digital pictures with no quality loss or wasting much of your time in the process.
The program is compatible with many file formats, gives you access to a wide range of editing options, and provides you with quality output files.