Hi, thank you for the above info, I likewise was really peeved when I updated my iphone 12 Pro to iOS 17 and itunes 12 no longer recognised my phone. For me the Mobileupdater keeps saying 'server cannot be reached', so try this:
Connect your phone using usb, and crank up itunes. Then power down your phone but keep it plugged in. Then, restart your phone and in my case itunes sees the phone and syncs.