Konica Minolta Magicolor 4750DN Reference Manual page 72

If KONICA MINOLTA magicolor 4750 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 mc4750 PPD is selected in the Print
Using list.
7
Click Add.
8
Select the appropriate settings in the Printer Memory, Storage, Paper
Source Unit and Duplex Unit according to your printer setup.
Printer Settings (Mac OS X 10.5) 1-47