BUG: GoPro Cineform not supported in current builds of Premiere Pro on OS X 11.5
All current versions of After Effects will render GoPro Cineform 10 bit with alpha files and AE, Davinci, and Blender on an M1 Mac. The codec will not work in Premiere Pro, with or without an alpha channel.
Give it a try. Create a shape layer in a new comp and render in AE with an Alpha channel using the GoPro Cineform codec. Import the rendered comp into AE. Everything is fine. Try the same file in Premiere Pro and you get an Incompatible format error message.
Photoshop will also no longer open movie files, but that's another post for another forum.