by Tom Nelson
Over the last week or so, my 2010 Mac Pro has occasionally suffered from a sleep-related issue. A few times after I wandered off and my Mac went to sleep, I returned to find the login screen, instead of the locked screen that usually displays when the Mac wakes from sleep. After logging in, I would see a notice that my Mac had crashed during sleep and automatically restarted to the login screen.
Image courtesy of Apple
Looking at the log files, it appears that the error involved the Mac’s processor(s), which failed to respond to a hardware interrupt. The result was that the Mac ended up in an unknown state, and had the courtesy to restart itself.