Follow the procedure below to setup USB connection.
Start Printer Setup Utility.
Under Mac OS X 10.5, start System Preferences and click [Print & FAX].
Click Add.
Mac OS X 10.5
Click [Default].
Mac OS X 10.4 or later
Click a printer that has "USB" indicated in the "Connection" column.
Other Mac OS X
Click [USB] on the pop-up menu.
The connected printer appears.
Select the printer, and then select its manufacturer from the [Printer Model:] pop-up menu.
Under Mac OS X 10.4 or later, you are using from the [Print Using] pop-up menu.
A list of printer types appears.
Under Mac OS X 10.5, select the printer you are using from the [Printer Name] list, and [kind] of USB.
Select the connected printer from the list of printer models, and then click Add.
Quit Printer Setup Utility.
When printing with a USB connection to a Macintosh computer, printer language does not change automatically. Use the control panel on this printer to change printer language to [Auto] or [PS] before printing.
USB2.0 can be used only with Mac OS X 10.3.3 or higher.