You can make the .windowResizability(.contentSize) scene modifier conditional like so: extension Scene {     func windowResizabilityContentSize() -> some Scene {         if #available(macOS 13.0, *) {             return windowResizability(.contentSize)         } else {             return self         }     } } And then use it on WindowGroup this way: WindowGroup { ... } .windowResizabilityContentSize()

Changing the NavigationView's style to .stack seems to do the trick for me. This has solved other navigation-related problems in the past for me as well. You need to apply the modifier directly to the NavigationView, not to its contents: NavigationView { ShoppingListsView() }.navigationViewStyle(.stack)