Exiting stations with JR pass

Hello,

I've been to Japan before, but this will be my first time traveling to Kyoto so I need to get a JR pass instead of using the suica card. My question is how do you exit the stations? I know they don't all have employees at the exits. I distinctly remember the Hachiko exit of Shibuya station had no one working at it when I had a problem with my Suica card. So how does the JR pass work when exiting a station?

Thank you,

--Michael