Mac becomes unresponsive and struggles to shut down on Catalina
I had one of those machines (iMac late 2013) that took forever to install, but it did install. I had some initial instability issues that I had to address, but once they were solved things seemed to go well. Until recently when every couple of days after being awake and running, it starts to get non-responsive. Attempting a restart basically puts every application into force quit mode (something is blocking them from quitting). Takes a while (like upwards of 3-4 mins) but it will eventually reboot and come up fine.
Couple of interesting groups of logs happening repeatedly in the attached.
iMac 27", 10.15