Mac: How to Enable Duplex Printing

How do I enable duplex printing on a Mac?

1. Click on the Apple symbol at the top left of the screen and go to System Preferences. Then click Printers & Scanners.

2. Click on the printer you are using. 

3. Click Options & Supplies on the right side. 

4. The printer window opens. Go to the Options tab.

5. Check the box for Duplexer, then click OK.