Macpup is a small, light OS. It runs in ram and is very fast. It is not a stripped down, bare bones, basic core OS. Macpup is a full featured system right out of the box with apps for office, graphics, multimedia, internet and much more. And it looks really cool
Macpup 550 is the latest based on Precise Puppy 5.5.0. It's an official woof build of puppy linux that is binary-compatible with Ubuntu Precise packages. It contains all the apps from Precise Puppy with the addition of Firefox 22. It also includes the Enlightenment E17 window manager. The EFL libraries version 1.7.5 and E17 version 17.0 were compiled and installed from source.