It will work on any platform. It is a catalogue of image files; it is not an application dependent on an operating system. There are, however, a few .psd files which you will need photoshop to open them. But that is very few images. It is an excellent product.
22.4 Gigabytes of Data in this package (4 DVD's). 1,268 TIF Images. 411 PSD Images (Photoshop Files). 2 Brush Files (Umm - they look the same to me - so, really just 1 photoshop specific brush set) 1 Tutorial PDF book. 2 Action Files specific to Photoshop - perhaps older versions of Photoshop (Older than CS 5.5) as I couldn't get most of them to work. A bunch of Word Docs (*.rtf primarily, three .doc, 4 .txt files) outlining how to use their templates/actions/brushes and such. This will work on any operating system that can open these types of files (which is why I gave a breakdown of what was in it - so you can see what you'll be opening and make that determination yourself if it is compatible with your current setup).
The majority of the images are JPG along with some PSD (photoshop) images. You can select the images directly from the CD without any type of installation software. As long as your image software can recognize these file types (regardless of OS), this product is a great resource.