Adding a Network Printer
Open up System Preferences and click "Printers & Scanners".
Click the + button to add a printer.
Click on the IP tab at the top (Red).
Enter the IP address of the printer in the "Address" box (Green).
99% of the time the Protocol will be "Line Printer Daemon - LPD" (Blue).
The printer should automatically show the correct driver, if not see below on obtaining drivers (Orange).
If under the "Use:" Menu it lists "Generic Printer" or something similar you will need to install updated drivers.
Do not click "Add", instead close the add printer window and download the correct drivers.
Either search for "Apple <printer company> drivers". You will need to get them from Apple not the manufacturer in most cases. You can also try the links below for common brands we use at the College.
For HP: https://support.apple.com/kb/dl907?locale=en_US
For Brother: https://support.apple.com/kb/dl894?locale=en_US