Important: Do not download random drivers from third-party “driver download” websites. They often contain adware or outdated packages that will not solve your problem.
: If your SCX-3400 is detected but won't print, try adding it manually in and selecting the driver for the Samsung M2070 Samsung Scx-3400 Series Driver Mac
A: macOS is looking for an AirPrint profile. The SCX-3400 series lacks AirPrint. You must manually add it via IP or Generic driver. Important: Do not download random drivers from third-party