What you are looking at has nothing to do with your issue. Find Roon OS is is meant to search your network and find a nucleus. You are not using Roon OS you are running MacOS so that screen is correct, and also meaningless to you.
And to add to @Rugby’s comment, it appears your Roon Server is running on MacBook-Pro-3 based on your screenshot. If your Roon Server were not running, you would not be able to see any of the options or information shown in the screenshot.
@Brian_Miller1, are you having any issues with Roon, or just the question that @Rugby answered above?