Konica Minolta magicolor 1690MF - Manual (Page 63)

Printer Settings (Mac OS X 10.5/10.6) 1-40
"
If KONICA MINOLTA mc1690MF does not appear, check that the
machine is turned on and the USB cable is connected, and then
restart the computer.
6
Check that KONICA MINOLTA magicolor 1690MF is selected in the
Print Using list.
7
Click Add.
8
Select an Optional Trays and Duplex Option to match to your printer
setup.