Unlike Office Powerpoint, you can not change file extension from .pptx to .ppsx to make an automatically playing slideshow. Here I will show you specific steps to make it in Keynote:
- Open Keynote
- Click on the Document icon at top right of the toolbar
- Under Slideshow Settings , tick the
Automatically play upon opencheckbox
- In the Presentation Type menu down below, select
Save your presentation
Now you just have to open the presentation up and it will automatically play without any further actions. Hope it helps you guys!