Automatically print on both sides (Mac OS X)
1.
Click the File menu, and then click the Print option.
2.
In the Printer menu, select the product.
3.
By default, the print driver displays the Copies & Pages menu. Open the menus drop-down list,
and then click the Layout menu.
4.
Select a binding option from the Two-Sided drop-down list.
5.
Click the Print button.