Epson L850 Scanner QuickStart for Mac OS X 10.x The Mac Tutorial Shows You Step-by-Step How-to Download and Install the Epson L850 Series Printers Scanner Driver and Software on Mac OS X 10.12 Sierra Unix/BSD Desktop. The Epson L850 Printers Scanner Driver Installation is Easy because it’s enough to Get & Run the Package Installer. Download Epson L850 Series Scanner Mac OS X Driver: Get Epson L850 Mac OS X Driver Epson L850 Mac Driver. Double-Click on .dmg Epson Archive Double-Click on L850 .pkg Installer Follow Wizard & Click on Install to Start Installation