If its a USB keyboard, no special device drivers are necessary. It will handle both Windows and Mac OSX. I have a new Logitech Internet Navigator keyboard and being USB, it works the same on two different operating systems. The legacy software drivers are for older PS2 sockets. A Mac won't recognize a PS2 keyboard just as a Windows PC won't acknowledge an ADB keyboard. Finally, while not perfect, the hardware is now cross-platform compatible for the most part.
(Denny Crane: "I Don't Want To Socialize With A Pinko Liberal Democrat Commie. Say What You Like About Republicans. We Stick To Our Convictions. Even When We Know We're Dead Wrong.")