MobileDevice.pkg untrusted, cannot open Xcode after OS X update

Question

After an automatic update of macOS v10.15 (Catalina), I am unable to open Xcode. Xcode prompts me to install additional components but the installation fails because of Mobi

Answer 1

This requires Xcode 11.1 to be installed.

I was not able to update to Xcode 11.1 until I updated macOS Catalina to 10.15.1. After updating my macOS, I was able to install Xcode 11.1, which also allowed the installation of the additional components package.