The signatures for the ModelContainer convenience initializers have changed to take the configuration as a named parameter. This should do the trick: struct AppleClosetApp: App { let config = ModelConfiguration(url: AppGroup.facts.containerURL ?? URL(fileURLWithPath: "")) var body: some Scene { WindowGroup { ClosetNavigationView() .modelContainer(try! ModelContainer(for: Closet.self, configurations: config)) } } }

That's essentially what I've been doing. ZStack with the primary view as the first child and conditionally showing the sign up view over it. Seems to have worked well so far.