The problem is the one in the macOS beta finder does not show the progress bar so you won't know if it is working or not until your get some prompt. Whether you are updating or backing up the device, you will know when it doesn't allow you to do another task. When you are updating after selecting the IPSW, you should see some sign on your device to confirm the passcode.
Thanks again for keeping up!!!.... I don't get any prompts on my Phone... i even disabled screen turn off to catch any glimpse but it just sits there... same as the Finder.