Thanks. I do understand the value of filing Feedback, but in this particular case I need to urgently fix or find a workaround for the issue, as more and more users are updating to macOS 26.2 and at this point I have no way of preventing them from experiencing the problem in the key component of the app which relies on WebKit.

[Obj-C] I made the warning disappear by adding the following line to applicationDidFinishLaunching routine in the app delegate: [NSApplication.sharedApplication.keyWindow orderFrontRegardless];

In my non-legal-expert opinion - when you are notarizing an app, you are using the notarizing tool as part of your internal development process. In contrast, of course it would not be permitted to make the notarizing service available to the users of your app.

@astevensflexion Thank you so much. 100% correct. altool method works while notarytool gives HTTP 500 error. Incredible.