If I am using photos does it have anything to do with Google photos?
Do the photos I have on my iMac have anything to do with Google photos?
iMac 21.5″, macOS 10.13
Question marked as
No, not by default.
There is an app that can upload images from Photos to Google Photos, but that's an extra install, and reports of it working the opposite way recently. But again, out of the box, they are two separate applications.