While it’s not wise to upgrade to Mac OS X 10.6 “Snow Leopard” until QuarkXPress 8 has been updated, it may be helpful to know whether your existing printers and scanners will work properly.
Apple posted a detailed list of Mac OS X 10.6-compatible printers and scanners, including a large number of devices from HP, Epson, Canon, Xerox, Apple and more. The article lists specific device software version numbers, whether drivers are provided from the manufacturer or are part of the Gutenprint project, and each device’s print, scan and fax compatibility.
The list is quite long, so there’s a good chance you’ll find that a driver is already available, but for devices not listed, check with its manufacturer to see when new drivers will be released. See the list at http://support.apple.com/kb/HT3669