Hello, With the most recent OS update for Mac (Catalina 10.15.3), my ImageClass D420 is stuck printing double sided. I have installed the latest driver, uninstalled and re-installed the printer from settings, but still no luck. Prior to the lates...
Thanks for the recommendation. I repeated the install, following your direction, but still have the same problem. Everything else seems to work fine, The two-sided option is grayed out (unselectable), but it always prints duplex.
