This is how to print double-sided on mac: How to print double-sided on mac (on printers with duplex printing support) Many printers nowadays have the option to print on both sides, but if you don’t you can still print on both sides by just flipping the pages.

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If you have no choice other than printing, doing it on both sides of the paper is still better than doing it on a single side. It is also an environmentally better choice. It also helps save page costs, which are trivial if you only print occasionally, but can be significant if you’re printing hundreds of pages. This is useful when you want to bind the printed pages together into a book.