If you create a new iOS SwiftUI App based on the "Hello, world!" template and run it under Mac Catalyst "out-of-the-box" (i.e. no further change) you'll also see a couple of [UIFocus] Failed to update focus with context <UIFocusUpdateContext: ***: previouslyFocusedItem=(null), nextFocusedItem=(null), focusHeading=None>. No additional info available. messages. From this I'd conclude that the message as such is not necessarily an indication of a problem in the app itself.