Turn on Save As on Mac Using the Option Key
OS X ditched the Save As option in favor of Export a while ago, but Appleworld Today indicates that you can bring it back to many applications by holding the Option key.
All you have to do is hold down the Option key while clicking on the File menu. In many applications, this changes Duplicate File to Save As. You can also press Option + Shift + Command + S. It seems to work with most Apple apps, including TextEdit, Pages, Preview, and Numbers.
How to enable “Save As” in Mac OS X Yosemite | Appleworld today