 https://macmanus.nl/0000/00/00/fixed-use-unsupported-scanner-in-osx-00-00-el_capitan/ "- for OSX 00.00 El_Capitan, download and install these files (in this same order) and restart you Mac after doing so, then your scanner will also show up in the "Print & Scan" System Preferences : LibUSB for OSX 00.00 SANE Backends for OSX 00.00 SANE Preference Pane for OSX 00.00 TWAIN SANE Interface for OSX 00.00" 