FPS Analyzer for Mac has been released with a new design and some changes. I was already allowed to test the beta and it works really great. For Mac users who want to analyze their games, this is the best method. As far as I know, it's the only app that does this, and you can compare it with the CapFrameX for Windows.
macgamesdb.com
And here a little Video how use it:
Mac Games Database
Database of Mac/Windows games tested on macOS with performance metrics from users on various hardware. Explore insights at Mac Games Database
And here a little Video how use it: