Actually, I feel PM 6 is way more unstable than PM 5, PM 6 spinning ball a lot, and sometimes I do rating filter there is no progress bar and will freeze, also PM 6 thumbnail and preview will not show and flashing sometimes.
I have both PM 6 and PM5 installed
but PM5 will always have a progress bar or some time will freeze a bit, but at least I know it is not crashing, I know to wait a bit will be ok, but pm6 is different, I'm not sure it is really crashed or just need to wait.
I'm not sure whether I upgrade to Catalina will help PM 6 works better?
Meanwhile I'm also afraid to upgrade the MAC OS, because I use PM a lot. If I upgrade to Catalina, I can not use PM 5 anymore.
I'm using PM6 3558, and MacPro-2013, Mojave updated version