I recently upgraded to a macpro desktop running the latest leopard operating system. I have a hp designjet 800ps printer attached via a usb cable. I have downloaded the latest driver for this printer from HP and added the printer to the printers list. Although the printer is shown as listed; I am unable to print anything. I have even tried changing the language setting of the printer itself; when set to HPGL/2 or auto the printer does nothing; if I set it to PS, I get an error message. I have been over this issue with HP to no avail. I really need someone to help me. Thnx much