We hear you. USB setup does not work on MacOS 10.15 or higher.
If you are using a Dropcam Pro, you can continue setup using the Nest app. If you are on Dropcam HD, I would suggest using a lower MacOs or a different computer for setup.
Hope this helps.
Thanks for the update. Have you tried installing using both the Nest app and by using a different computer? Did you get an error code?
If so, you can check this article on how to Troubleshoot Nest camera and doorbell setup messages.
Just checking in to see if you still need assistance with this issue. We'll leave this topic open for another 24 hrs in case there are any follow up questions or comments. Please let me know if you need further assistance.