USB printer sharing is for people (or offices) with multiple Macs connected to a network (Chapter 12), who’d rather not buy a separate printer for each machine. Instead, you connect the printer to one Mac, flip a couple of software switches, and then boom: The other Macs on the network can send their printouts to the printer without actually being attached to it—even wirelessly, if they’re on an AirPort network.
Figure 13-5. To use a USB printer that’s been shared elsewhere on the network, open the document you want to print and then choose File→Print. In the list of printers, you’ll see a new item called Shared, which lists the printers that have been shared on the network. (Point to one without clicking to view the details rectangle shown here.)