The bulk of those reporting problems with Office for Mac 2016 began seeing the applications crash last week after they upgraded to OS X 10.11, aka El Capitan.
'It would have been a simple correspondence: 'Hey, we see you use our new Office 2016 on Mac, there's a big OS X update coming, give us a bit of time until you download it.' No harm, no foul.' 'How is it remotely feasible that neither Microsoft (mostly at blame) or Apple (ignorance is not great customer service) had any proactive communication to NOT DOWNLOAD EL CAPITAN?' asked a commenter labeled 'cxr341' on Tuesday.