Hello, Has anyone solved this issue beyond reporting it as a bug? I am encountering this same issue since downgrading from Catalina to High Sierra. I am having similar issues with flickering and slow loading of graphics, missing files such as iTunes song purchases, imported mp3 music files. I am running High Sierra with latest updates (according to Apple servers) on a Mac Mini 2012 Late fall.
Another noted symptom is when I view about this Mac and software there is zero software listed, not even any apps I have purchased and installed on my machine…. Here is my error message: (The plug-in did not respond quickly enough while gathering this information.)
Here is my error message in my log files I'm most concerned about:
Oct 25 11:33:48 Cynthias-Mac-mini pbs: BUG in libdispatch client: kevent[mach_recv] monitored resource vanished before the source cancel handler was invoked
Thank you for any advice or solutions.