How do you print more than one picture at a time form OS X?
How do you print more than one picture at a time on OS X/
Mac Pro, iOS 8.1
Your question is somewhat vague. Could you be more specific? What's the source of your pictures? Are you in iPhoto? Photos.app? Photoshop? Preview.app? something else?
Or are you looking in the Finder? If you select multiple images in the Finder and choose File -> Print (⌘-P) then it should open them in Preview.app and print them all.