The Printer Utility that gets installed by the driver installer will not launch. Note: do not choose Use: AirPrint in steps 10-11 or you will be right back where you started - gibberish chararcters. go to the Options tab and enable the Duplex Unit (assuming yours has one).
and scroll the list until you see your Samsung model series select it and click OK.
Find your printer in the list and select it after a few seconds you should now see the Name appear below.Double-click the installer package labelled Printer Driver.pkg.Double-click the folder icon labelled MAC_Printer.Double-click the freshly downloaded Samsung_Mac_10.15_Driver_V3.91.00.dmg file.Download the new Madriver (V3.91.00) from the link provided above in the thread.Here is the recipe to getting your Samsung printer printing on MacOS X 10.15 Catalina: But no thanks to HP or Samsung as this whole printing thing is ugly. I have messed around with it for many hours already and I am pleased to say I have finally managed to get it to work. Guys, I have this exact same problem on three systems (two 5K iMacs and a Macbook Pro).