HP Support Forums
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09-03-2009 02:45 PM
Let's make sure the option has been enabled in the printer queue.
Go to System Preferences/Print and Fax
Highlight the 7410 in the Printers box on the left
On the right side of this window, click on Options and Supplies
Click on the drivers tab
There should be a checkbox for HP Two-sided Printing Accessory (Duplexer) make sure the checkmark is on that box.
Try another two sided printjob, and select Plain paper.
If it still doesn't work. Go back to System Preferences/Print and Fax and delete the 7410 printer queue. And then setup a new 7410 queue by clicking on the "+" button. This ensures the Snow Leopard is using the builtin OS 10.6 drivers and not the older 10.5 drivers installed before the OS upgrade.
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09-03-2009 02:56 PM
MBJustice, you're a hero for pointing this out. The change in printer controls buries duplex printing under layers of obscurity. I never would have found it without your help.
02-02-2012 09:21 PM
I have a Mac Book Pro with Office 2011 and a HP 7410 All in One Printer. When I go to print from word and Excek The Print set up window only shows "Collated" and there is no box for Two Sided Print (this window shows for other programs).
02-27-2012 12:54 PM
Thanks for the post. I've included a link below that may assist with this two sided printing issue. Good Luck!
*Say thanks by clicking the *Kudos!* which is on the left*
*Make it easier for other people to find solutions, by marking my answer with (Accept as Solution) if it solves your issue.*