I am trying to set up an old camera in a new location. This is the error message that I am getting on my MacBook Air - “Nest Cam Setup (Macintosh)” needs to be updated.

Hello Applegirl1959,

Thank you for using Apple Support Communities.

We understand that you are moving your Nest camera to a new location and are getting a error ,message that the Nest Cam Setup needs to be updated. It appears that if you change router settings or install a new router, you will need to update the setup information on the Nest camera. Take a look at this article from the Google Nest Help pages:

How to update Wi-Fi settings on Nest camera and Nest Hello

This article could also help:

How to keep your Nest products and the Nest app up to date

Best regards.