Old Operating System on IMac
What printers work with an Imac OS High Sierra 10.13.6 operating system?
iMac 21.5″, macOS 10.13
AirPrint as such may work with operating system versions as low as OS X 10.9 Mavericks, or even Mac OS X 10.7 Lion. This means that there is a good chance of finding a suitable printer for macOS 10.13 High Sierra among the models listed in About AirPrint - Apple Support. However, additional software (not always absolutely necessary) from the printer manufacturer for setup, ink management and similar purposes may require a later macOS version. So, you should investigate this on a case by case basis. Please post back if you have a special printer model in mind.
