Printing Two-Sided PIXMA iX6820

I am trying to make a 12-page saddle-stitch booklet in In-Design and I am at the Layout options for the printer. I am watching an online tutorial and their dialog box has 'double-sided' checked and I don't even have that option and the 'Two-Sided' options are greyed out Am I just not able to do this with this printer or is there something I can download to get it working? Any help with this would be greatly appreciated. My printer says '6820' but the dialog box says '6800', so that is confusing, I saw no drivers for download for the 6820. Can I use the 6840 driver or no? I am on a MAC OS Sierra.