If you are running Roon (what was previously called the Roon Core) on the Mac, then you need both Roon and Roon Server running. Roon is the GUI control app, Roon Server is what’s responsible for the audio.
The version numbers are unfortunately a bit confusing, but you are running …
and these are the latest versions (while 2.0.25 (build 1353) was the update from November which introduced the Roon / Roon Server split for the first time)
You can always find the latest versions listed here: