If you don’t already know it, then this tip is about to blow your mind. It’s the paper roll for the Mac’s Calculator app, which has been a feature since, like, forever. You may have been using the Calculator since the very beginnings of Mac OS X, and yet you may still have never seen it.
There’s an old proverb: “The best time to plant a tree is twenty years ago. The second best time is today.” That totally applies to the Mac Calculator’s paper toll. Let’s check it out.