Gail BERISH wrote:
Why must I "contact developer" when Apple updates my computer?
Because you have installed some 3rd party system modification that either isn't compatible anymore or won't be soon. Apple is doing this so you can either get this software updated or remove it. If you can't do either, then you might have to put off an upgrade and use the software to export any data into a more portable version. Otherwise, if you just update, you could lose access to your files.
Do you realize how hard it is to contact developers?
I'm a developer and people contact me all the time. But all developers are different. If you are having trouble contacting a developer or getting a response, then that is a very good sign that the software is no longer being supported. Apple can't help with 3rd party software. If the developer can't help either, then you're on your own.
You should probably remove the software, which can also be difficult.