I just installed Premier Elements and Photo Elements 14 on my IMAC. I have El Capitan installed as well. How do i make Elements the defaults photo and video program?
In Finder, right-click on the media file and select Open With. Then, on the Open With option page, select the program from the list of applications and check the Always Open With option.
I am strictly an Elements Windows user, but see if this online article gives you the default programs Mac information that you seek.
If it were Windows, I probably would change prel file extensions for the Open With for Premiere Elements and change jpeg for Open With for Photoshop Elements, but that is generalizing.
Please let us know if the Mac information worked for you.