How to make a slideshow in Photos for iTunes
I wish to make a slideshow in Photos and move it into iTunes and watch it on Apple TV. Please help.
iMac, OS X El Capitan (10.11.3), Photos 1.3
In Photos select the photos you want to use in your slideshow, then use "File > New Slideshow".
See this Help page: Create slideshows
Once the slideshow has been arranged to your liking, use the Export button to render the slideshow as a video.
In the Export panel select the video format you want and enable the button "Automatically send to iTunes".
Now you can play your slideshow in iTunes.