Sometimes you can’t use the menu command, or it doesn’t work. What do you try next?
Does El Capitan suffer the most evil bug of all, which suppresses the normal kernel panic process?
For the last 15 weeks, this iMac has been freezing sporadically. I have run out of ideas, and hope that 10.11.6 fixes the bug.
Things were not looking good: my Mac would not start up, and the RAID would not shut down. Stalemate.