How do I fix issues with printing on both sides of the paper?
Check that both sides of the paper are placed correctly within the printer.
Verify the settings in the printer’s preferences to see that double-sided printing is enabled.
Go to the print queue window and ensure that the settings will be applied to the printed document.
Verify that the checkbox for double-sided printing is checked in the print queue window.
If the printer allows, select the option to print odd/even pages separately.