Hi,
I have this problem.
When I first upgarded my mac to El Capitan, I couldn't print two sided as usual with the click on the option (it was no longer there) when I using Word.
Then, I use the layout option to print 2 sided with Word. And it worked.
However, with PDF, the option is available by defualt setting as before.
For whatever reason, I now can use this method to print 2 sided with Word but not with Excel.
Any even more interesting is that even with PDF, while the 2 sided printing option is availabe and is checked, it won't print 2 sided.
Please help. I have updated all the printer driver from Canon.
Nic