Q: How can I enable two-sided printing on my Mac with OS Yosemite?

Two sided printing is only available if your printer has the capability. Since you didn't provide any information about the make and model of your printer, there is now way that anyone can help you.

I have the same problem, but it seems to occur only with Adobe Acrobat, Reader as well as Acrobat Pro DC. Printer used: Brother HL-1140D series. On my iMac I have Yosemite OS 10.10.5 and there is no way to print double sided. Screen shot Print window in Acrobat, there is no option next to the amount of copies to print two-sided and you can't find it somewhere else:

Screen shot, in this case printing from Firefox, where you see next to Copies the possibility to select Two- Sided:

Firefox and Adobe Acrobat use their own custom print panels, not the print panel from OS X. The lack of a Two-Page/Duplex setting on Adobe print panels is a matter that you need to address with them.

Adobe Reader (11.0.14), and Adobe Reader DC (15.010.20059) do not present duplex (Two-Sided) settings on their print panel. You must enable/disable duplex printing with your printer directly, providing your printer hardware supports it, via the web browser configuration for your printer, printer-specific software, or the OS X System Preferences : Printers & Scanners : <printer name> : Options & Supplies settings.

In Adobe Reader;  click the Printer button at bottom of print box,   in the print driver window, select a binding option in the Two Sided dropdown menu

Thank you for replying. I have tried what you advise already, but also there I see no two-sided possibility. So it is not Adobe only, also the Mac OS does not offer me what you suggests. Selecting in Options "General", "Supply Levels" or "Utility" doesn't help as well. When I print from "Mail" two-sided is available (see screenshot 3). Printing from Microsoft Word, again I find no 2-sided option (see screenshot 4). In Adobe InDesign you have to click first the button "Printer" where you can select two-sided. Printing from "TextEdit", "Keynote", "Preview", "Safari" and "Firefox" 2-sided option is visible directly after your print command. I did not included from each example a screenshot, but believe me, it is true.

Best regards,

Jerome

Select Finishing here:

Select Two-sided here:

Dear MrHoffman,

Thank you for this reply. That I had to check "Two-Sided" to be able to print two-sided was already long time clear to me, but that in the other cases I had to switch "Copies & Pages" to "Layout" to be able to select what I need had not yet reached me. Of course Apple has pampered us for long time so much with obvious places of much used tools (like just having to check "Two-Sided" next to the amount of "Copies" you want) that I overlooked that they could be nested a bit deeper. Once you are noticed by a convincing red mark on a screenshot it has to be found on that location and nowhere else, it is more easy to find it.

For those interested in the matter: in Adobe InDesign you have to click first the button "Printer…" (red marked) in the Print window to be spoiled with two different ways to switch on the two-sided print option (green marked).

I hope that with your reply the original post from poppyandsprout is solved too.

Thanks again and best regards,

Jerome

That's a pretty glib response-- and, alas, flat out wrong.  Just do some searching via Google or in these forums.  Many people have fully capable two-sided printers that *aren't* working.   It's related to the printer drivers and the operating system.

We have 2 Brother printers that work fine under recent OSs, doing two-sided printing with aplomb.  Under older OSs, though, the option is greyed out! 

Others have found when they upgrade to newer OSs, the 2-sided options are greyed.