There must have been things selected on a campher & didn’t see & it went into lala land … didn’t respond to the mouse & I shut everything down & it took 40-50 minutes to max the 4Gb on the laptop, gave a dialog to quit & took 15-minutes to unwind back to normal.
Clock was ok, it limited overall to 25% but hit 100% memory 3-4 times before the dialog appeared.
I’m impressed, I didn’t lose a thing so just an fyi be patient, memory mgmt. is proper.