Mouse-behavior: Cursor moves, but aggressive punching required for click to work.
And bizarre characters on-screen. Um, why? Done basic Mac fixes: restart, re-install, left it shut down for an hour. 2019 iMac.
Question form now saying
YOUR POST MUST INCLUDE TEXT. Try again.
iMac even misbehaving trying to fill out the community question form.
Mac Pro (2019)