About a month ago, my iMac (Retina 5K, 27-inch, Late 2015) crashed very hard. It would no longer restart into anything but the recovery console. It seemed pretty clear that something was very corrupt and I found myself facing a system reinstall, at the very least.
Time Machine to the rescue
Since it’s a desktop, I have a backup drive attached to it at all times. Time Machine runs several times per day. My latest backup was from about ten minutes before the system crashed. I cannot stress how... [More]