That's a common basic layout for t-shirt sites these days, but I believe the shopping cart/site set up is usually custom made. Looking at the source, those two sites most likely do not use the same software despite their similarities.
It runs on the server (i.e. on your webhost's computer), not on your computer, so it doesn't matter what you are running at home. So no, it's not available for Macs, but yes, you can use it if you have a Mac.annaylee said:Is OS Commerce available for Mac Computers?