I managed to stop the critical update prompt at startup by deleting the following folder:
/System/Library/Templates/Data/Library/Apple/System/Library/Private/Frameworks/MobileDevice.framework
To do this, you first need to disable System Integrity Protection by booting into recovery mode and executing: csrutil disable
The only issue I encountered is that the camera stopped working.
Topic:
App & System Services
SubTopic:
Core OS
Tags: