I'm working through the App Development with Swift and at the end of unit 5, in the Restaurant Guided Project the OpenRestaurant.app fails to open. I right-click the file, select Open from the drop down. The prompt that is displayed says: "OpenRestaurant" can't be opened. You should move it to the Trash. When I select the question mark button in the bottom-left cornet of the window a Mac Help window opens with the article: The app's authorization has been revoked.
Solutions I tried so far:
- running on two machines: one with 10.12.6, one with 10.13.3,
- running on each machine with Gatekeeper enabled and disabled,
- fixing permissions as suggested here: https://apple.stackexchange.com/questions/262355/***-cant-be-opened-you-should-move-it-to-trash-for-flash-projector-applicat/262361
Does anyone have any suggestions on possible fixes?