I disagree with you both, but that's ok. We can each do our own thing and still be friendly.
On the technical front: JRiver as a company has shown very little interest in porting Windows specific features to MC on other platforms. Things like decoding of DVD and BD, the WDM driver, and visualizations all use libraries or components that are only on Windows. Duplicating them for Mac or Linux is apparently a lot of work without enough return to justify the effort and expense. So, in my opinion ONLY, we will never see these features in MC for Mac or Linux or any other platform; only on Windows.
As for MacOS having problems, I'm sorry to hear you are having trouble. The platform itself is rock solid. I often find that former Windows customers have a hard time switching to Mac because they are expecting this non-Windows platform to behave like Windows. It obviously does not. But it can be hard to get used to thinking of things in a different way.
Or perhaps you really want to use some programs that work really well on Windows, but not so great on Mac. I can tell you from experience that the Mac can be an extreme stable easy to use platform. But not if you are trying to force it to act like Windows.
I sincerely wish you the best of luck.
Brian.