I used the Photos app on my iPhone (running iOS 11.4) to edit a Live Photo with the "bounce" animation feature.
I've imported the image into the Photos app (version 1.5) for macOS El Capitan. I can see the little "Live" icon in the corner, indicating that it is a Live Photo, but I cannot see the animation in the Mac app.
Is this because animations like this are only compatible with newer versions of the macOS Photos app? If so, can I safely keep the photo on my Mac and expect to be able to view the animation -- and perhaps edit it further -- once I upgrade to High Sierra or the like?
On a side note, I see that there are two different files for the animated Live Photo within the app, i.e., one has a normal filename (IMG_1077.JPG) and the other includes letter "E" in the filename (IMG_E1077.JPG). Is it safe to presume that this second file is related to my animation?