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Re:Apple’s 2016 in review by wl on Tuesday January 03, 2017 @01:18PM (#13311428)
> I've never seen that [memory pressure] halt animations, mouse motion, or stop the clock from updating.

This is exactly what I've seen. If I catch it early enough and can get the UI to respond to me tabbing to the terminal, I can kill Safari's web content processes or whatever it is that's leaking memory and it goes away.

Re:Apple’s 2016 in review by eridius on Tuesday January 03, 2017 @01:39PM (#13311685)
The only thing I've seen stop the clock (besides SystemUIServer itself hanging) is a forkbomb. But even that didn't stop the cursor. If the cursor is stopping, that indicates something more serious is going on.