In PowerPoint 2019 for Mac or PowerPoint for Office 365 for Mac, you can add visual interest to presentations with animated backgrounds for your slides.
To get started creating an animated background, simply add a still image as your slide background, and then on the Picture Format tab, select Animate as Background.
Add motion to a still slide background image
Select the slide you want to add an animated background to, then go to Insert > Pictures, and choose either Photo Browser or Photo from File.
Select the picture you want, and then select Insert. You may need to resize the picture to fill up the slide.
On the Picture Format tab, on the far right end, select Animate as Background.
A dialog will open with a preview of your background picture.
Click on the parts of the picture you want to have the movement of your animated background focused on. When you're done selecting points of interest, click Apply.
To see your animations in action, view the slide in Slide Show mode.
To edit your animations, select the background picture and select Animate as Background again, and repeat step 4.
You can add text and other content to the slides over your background images, and they'll remain in place while the background moves behind them.
Note: While you can only create animated backgrounds in PowerPoint for macOS, they'll be able to play in other versions of PowerPoint.
Animate as Background is only available if you have PowerPoint 2019 for Mac or PowerPoint for Office 365 for Mac.