I dont know if I am posting in the right forum, But I use GIMP for my editing and I needed to convert an rgb file into cmyk. I found that I can do that using a gimp plugin called separate. I followed all instructions for MAC as specified in the documentation to get it installed..but I wasnt successful. If anyone can help me in this regards, I would highly appreciate it.... Thanks a lot for your help.
The page for the plugin I am trying to install