If your coupons are printing tiny on a Mac, and you have a Canon printer with AirPrint feature, follow the steps to add a Non-AirPrint driver to resolve the issue.
1. Go to apple icon on your desktop menu.
2. Select System Preferences then Print and Scan.
3. Click the + and a window with the list of printers will appear.
4. Select the correct printer model and series.
5. Click Add and a window for set up will run.
6. Once added, select the printer as your default printer.