Konica Minolta bizhub C20 Reference Manual page 70

If KONICA MINOLTA bizhub C20 does not appear, check that the
printer is turned on and the USB cable is connected, and then restart
the computer.
6
Check that KONICA MINOLTA bizhub C20 PPD is selected in the Print
Using list.
7
Click Add.
8
Select the appropriate settings in the Printer Memory, Storage, and
Paper Source Unit according to your printer setup.
46 Printer Settings (Mac OS X 10.5/10.6)