With iOS 16 and watchOS 9, Apple imposes “developer mode” on application designers. For “protect users from inadvertently installing potentially harmful software on their devices”the Cupertino company prevents the direct installation of files
.ipa with Apple Configuration or compiling and running from Xcode.
To perform these operations, developers must activate a dedicated mode in the section Privacy and Security Settings. Apple wants to ensure that the user understands the risks incurred when using self-signed applications, a very legitimate practice during development, but also used to install pirated applications or bypass the App Store system.
This function does not affect the installation of applications from the App Store, or even from TestFlight, which is increasingly used as a secondary distribution channel. After enabling ‘developer mode’, you will need to restart your device and then confirm the security policy release with your lock code. The “developer mode” is also necessary to install the beta versions of the systems.