How to run Xcode 11.4 on macOS Mojave 10.14.6

Question

Background on problem:

I have an iPhone 6s that has updated itself to iOS 13.4. Before the iOS update, I could code + run my app on the device from

Answer 1

You cannot run Xcode 11.4 on Mojave but you can add support for iOS 13.4

• Download the 13.4 image from this repo
• Quit Xcode
• Unzip the archive and move the folder into /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport
• Launch Xcode

Consider that this way adds only the support for iOS 13.4, nothing else.

Update: This does not work with iOS 14 because iOS 14 requires Xcode 12.