What operating systems/platforms does xTuple ERP run on? Windows? Mac?

xTuple is operating system/platform-agnostic. Both the client and the server software run on Windows — as well as Mac OS X, Linux, and even other Unix systems. Mobile, too. You — and your customers — can mix and match however you like, leveraging investments in existing technology without having to buy all new systems. That of course frees up more money for you.