I think that I am one of the early adopters of JRiver Media Center 27 64-bit on Apple macOS 10.15.x 64-bit "Catalina," Manjaro 20.1 64-bit "Mikah," and Microsoft Windows 10 64-bit Pro edition version 1909 as of the current September 2020 Microsoft Patch Tuesdays security updates on two laptops.
I also think that I just inadvertently reported a bug within JRiver Media Center 27 64-bit Master License for Apple macOS 10.15.x 64-bit "Catalina." Would the JRiver team please look into this technical issue and get it patched with the release of a newer version in the near future?
I am so close to getting JRiver Media Center 27 64-bit Master License to just work on three different desktop operating systems on two laptops. The Manjaro GIT repository and the Windows 10 versions of this software product mostly just work at this time which is why I am not reporting bugs that affect me at this time although I am sure that the JRiver team is hard at work to make it mature and stable in the future. The Apple macOS version needs to be fixed so I can log into my Perc Data account and it can download and install the EPG data and information so I can watch over the air television using this software product hopefully in the near future.
I am hopeful and optimistic that the brilliant team at JRiver is going to fix it soon. I am watching this thread for updates. Thank you for your hard work in fixing and improving this software product and version in the future.