In reply to the past comments about random shutdowns with MacBook Pro late 2013, I also have this experience and I think I have solved it, at least on my MacBook. . My MacBook Pro experiences this random shutdown, and has been for many months, however only in High Sierra. I also boot camp into windows this shutdown does not occur when in Windows in Bootcamp. I erased the entire drive and installed El Capitan and I have not had a random shutdown since then.