Installing Epson XP-420/XP-422 Driver on Mac OS X 10.12 Sierra The Mac Post Shows You How-to Download and Install the Epson XP-420/XP-422 Series Printers Drivers on Mac OS X 10.12 Sierra Unix/BSD Desktop. You dispose of Two Ways for Installing the Epson XP-420/XP-422 Series Printer Driver on Mac OS X 10.12: Checking for Software Updates […]