Apple halts iOS 13.6.1 code signing following iOS 13.7 release

Apple on Tuesday ceased signing code for iOS 13.6.1, effectively barring users who updated to the latest iOS 13.7 operating system from downgrading.

Issued last week, iOS 13.7 includes new capabilities for Apple and Google's coronavirus Exposure Notification system. Specifically, users can now opt in to the program without first downloading an app developed by their local government.In addition, the new Exposure Notification Express feature enables Apple to present health instructions to users if it is determined that they were potentially exposed to the virus. This is accomplished without a third-party app, though data sharing with public health authorities is required for full functionality.

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