Require a password to exit a presentation in Keynote on Mac
You can require a password to stop or exit a presentation. This password requirement is useful, for example, when the presentation is set to play automatically in a kiosk.
Go to the Keynote app
on your Mac.Open a presentation, then choose Keynote > Settings (from the Keynote menu at the top of your screen).
Click Slideshow at the top of the settings window, then select the “Require password to exit slideshows” checkbox.
Type a password, then click Set Password.
To remove the password, choose Keynote > Settings, then deselect the “Require password to exit slideshows” checkbox.
This password applies only to slideshows played on the Mac where you set the password.
You can also add a password to a presentation so that only those who know the password can open it. To learn more, see Password-protect a Keynote presentation.