In order to print to Library printers you need to follow these steps:
Download the popup.dmg file here.
Find Popup.dmg and double-click on it to create a new disk image in Finder. This disk contains the PopUp installer, Popup.pkg.
Double-click the Popup.pkg installer to run it. You may be requested to authenticate yourself as an administrator.
Select a destination disk. You will only be able to select the startup disk.
Click Install (or Upgrade). The installer automatically installs the PopUp software.
Pharos PopUp will now be running on the computer and will be automatically launched every time a user logs in.
Once PopUp is installed you will need to add the library printers to your printer list. Please ignore the ReadMe.html instructions included with PopUp.zip and follow the instructions below to complete your printer set up.
Open System Preferences and click on the Printers & Scanners icon.
To add a printer click the + button.
Right-click or hold down the Control key on the keyboard and click anywhere on the toolbar. From the popup menu that appears, select Customize Toolbar....
Drag the Advanced icon to the toolbar and close the customization dialog.
Click on the Advanced button in the toolbar.
From the Type popup button, select Pharos Print Server.
In the URL field, enter the URL, as shown below, for the printer you wish to install:
popup://libprint01.public.library.upenn.edu/Lib_BW for Library Black and White
popup://libprint01.public.library.upenn.edu/Lib_BW_Duplex for Library Black and White Duplex
popup://libprint01.public.library.upenn.edu/Lib_Color for Library Color
popup://libprint01.public.library.upenn.edu/Lib_Color_Duplex for Library Color Duplex
In the Name field, enter a name for the new printer queue. This is the name that will show on your computer. From the Print Using popup button, select the type of printer. "Generic PostScript Printer" will work in most cases. Click Add. The new Popup queue will now show up in the list of printers. To print to the new queue, select it from the printer popup button in the print dialog of any application.