12th July, 2023. I'm going to try creating an iOS app called Paranovel, using Expo. My environment for mobile app dev (Xcode, Ruby, etc.) should be in reasonably good shape already as I frequently develop with React Native and NativeScript.
Go to https://docs.expo.dev, and see the Quick Start: npx create-expo-app paranovel
This runs with no problem, then I get this macOS system popup: