Thank you for your answer. I have been trying to modify the info.plist in a lot of different ways but I am still getting the same issue. The Unity project info.plist is set with Preferred Default Scene Session Role as: Compositor Services Immersive Space Session Role. Because I want to start with a 2D view, I put it as: Window Application Session Role and I am able to navigate on the view but clicking to start the Unity framework does not work and prints the message I mentioned. I tried to set it as: Compositor Services Immersive Space Session Role or any other options but the app crashes. I tried to load an Immersive Space with await openImmersiveSpace(id: "") before calling the function to start Unity but the best I get is a black screen as the environment.