Try using the built-in Windows PS driver. From what I can see that printer came out in 97, I doubt anyone has written 64 bit drivers for them. If you can't find the right driver, that's bacause there is none out there. Try some other models maybe, about all you can do short of replacing the drivers. Or just have the MACs print to the other printers, just because they are MACs does not mean they can only print to an Apple printer. As much as Steve Jobs would love to see that.