Xcode 11 run app on iOS 12 and lower
Creating an app with Xcode 11 has a little bit of a hidden issue, it does not allow you to run the app on iOS 12 or lower out of the box. There
Build Issues
A collection of 2 posts
Easily fix "build only device cannot be used to run this target"
How to fix "build only device cannot be used to run this target"