For Macintosh - Epson Stylus Pro 7500 Startup Manual

7. On the Ports menu, make sure that the new port is added and
the check box is selected. Click OK to close the printer driver.

For Macintosh

This section tells you how to set up the printer for use on an
AppleTalk network. By setting up your local printer as a shared
printer, it becomes connected to the network and can be used by
other computers.
First, you need to setup the printer as a shared printer on the
computer to which it is connected. Then, you must specify the
network path to the printer from each computer that will use it,
and install the printer software on those computers.
Setting up your printer as a shared printer
Follow these steps to share a printer connected directly to your
computer with other computers on an AppleTalk network.
1. Turn on the printer.
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Setting up the Printer with Your Computer