I have been able to get models from .dae (COLLADA) files with animation working in the SceneKit preview (which is the best way I know to test if an animation is compatible).
I have a freelancer who made an animation for me originally in Cinema 4D, used a plugin to help with the animation, and exported it to me in .abc. He says he thinks the animations get lost when trying .dae format.
When I import his .abc file into Blender, it plays the animation perfectly, but importing into Xcode/SceneKit (whether I try to play it as a .abc file or after converting it to .scn) won't play the file. You can at best just see the initial positioning of the 3D model and no animation will play.
