Open "System Preferences" through the apple menu.
Select the "Print Printers & FaxScanners" Icon to open printer settings.
Press "+" to add a printer. If If the "+" is grayed out, unlock this menu by clicking on the small lock icon in the bottom left hand corner of the window and then put in your administrative account information.
Go to the "IP" tab. Under this tab, insure that the Protocol is set to "Line Printer Daemon - LPD", the Address is "printer.cis.rit.edu", and that the Queue and Name are set to the appropriate printer ("guppy" or "sailfish").
The printers will work with the Generic PostScript Printer driver but you will lose some of the advanced features available with the driver. Assuming that the printer driver was installed correctly, select "Select Printer Software..." under "Print Using:".
Then select the appropriate driver from the list and click "ok".
Now click with no difficulties. Now click the "Add" button. When using the correct driver, an additional "InstallableOptions" screen will appear. This screen should be fine with the default settings. Click the "Continue" button to complete the printer installation. Be sure to check the "Duplex Printing Unit"
Your printer should be ready to use. If you have difficulties after following this wiki, please contact firstname.lastname@example.org for assistance.