Downloading iPhix 1.1.1 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The software lies within Design & Photo Tools, more precisely Viewers & Editors. This Mac application was originally created by Phix Software.
From the developer:
iPhix is the perfect companion app for professional or casual photographers who want to easily edit, apply filters and share their pics and filters.
With this program you can make any picture look as if it was taken with a vintage camera or be creative and define your own style by creating your own filters. You can even share your adjustments with your friends by uploading your "recipe" along with your picture.
You may want to check out more software for Mac, such as Vectorworks 2010 Viewer, DropImageURL or Polaris, which might be similar to iPhix.