Our website provides a free download of PTMviewer 1.0 for Mac. The actual developer of this free software for Mac is Hewlett-Packard Development Company, L.P. The software is included in Design & Photo Tools.
From the developer:
Polynomial Texture Maps (PTMs) are a simple representation for images of functions instead of just images of color values.
You may want to check out more software for Mac, such as Web-Image-Collector, iPodEditor or MacLux Pro, which might be related to PTMviewer.