Since the switch does not need a driver, the setup relies on your Operating System recognizing the printer through the switch.
This is a deep dive into the world of the 2-Port USB 2.0 Printer Auto Sharing Switch Since the switch does not need a driver,
While basic manual switching is often and requires no drivers, the "automatic" feature typically requires a specific utility. GUB231 - IOGEAR 2-Port USB 2.0 Automatic Printer Switch Since the switch does not need a driver,