If it is in free stuff, we Mac users will download it anyway if we like it. As per the above comments: we can indeed readily open just about anything except .exe files. If you are selling something, clearly state in the product information that you've only tested it on a PC. It is nicer if you have a Mac-using friend who can test it for you, but if not, make it clear, and we will take our own risks. Note. I hate all those folders within folders within folders that the PC people use for automatic installation. I'd much rather have 1 folder with a readme file (giving the author's name!!!) and a sub-folder containing the actual item(s) to be installed. I have both PCs and Macs, but prefer to do graphics on the Macs and communications/business of the PCs. Best of both worlds. Carolly