How can I configure my printer to always print 'doublesided' on an iMac (hp 6800)

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How can I configure my printer to always print 'doublesided' on an iMac (hp 6800)
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print-double-sided-mac.jpgyou can modify the settings, then save as preset. so next time you'll choose the preset which automatically have the settings you saved

check here for presets information
JohnBusiness Consultant (Owner)
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Some applications override this and will use the application settings instead of the printer settings. So setting the printer is not universal.
On OSX there is always an option to skip the in-app print settings (For example in Google Chrome) and revert to the system print settings so if you configure the System Print settings and save your PRESET to be double sided you can always print that way but it may require a little intervention.
Distinguished Expert 2017

OS X uses the ćups system to handle prînt jobs. changing the printer default settings in the cups system is what you are looking for.

In short, navigate to http://localhost:631/printers
That cups interface is disabled by default these days.  You'll need to enable it first to navigate to it.  To do that, you'll need to edit /private/etc/cups/cupsd.conf as root, then change the line from

WebInterface No

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WebInterface Yes

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You can just open and copy and paste this command, it will prompt for your password and do it for you if you are using an admin account:
sudo sed -i  "s/WebInterface No/WebInterface Yes/g" /private/etc/cups/cupsd.conf

When you're done, you should change it back to keep fewer things running on your system that might become security holes:
sudo sed -i  "s/WebInterface Yes/WebInterface No/g" /private/etc/cups/cupsd.conf

It's just easier to do it from System Preferences and save the preset.  That's the standard way to change it.

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