The code base for the product changed depending on the version of MacOS being used. What happened back in September 2018?īack in September 2018 there was a mostly hidden switch in Office 365 for Mac software. But no updates, because those updates need the more recent Mac OS. If your computer has 10.11 (El Capitan) or earlier, Office 365 for Mac will still work and get Microsoft’s mainstream support. The ‘subscription’ Office 365 for Mac available now needs the MacOS released in the last two years. Office 365 for Mac needs Mojave, Sierra or High Sierra In short: Office 365 for Mac gives you the latest features and updates if you have the latest MacOS (Mojave 10.14) or the two before (10.13 High Sierra or 10.12 Sierra). The situation appears confusing, so we’ll try to break it down for you. Microsoft has a blog post might be accurate, but it doesn’t exactly shine with clarity. Some Office 365 for Mac users might not be getting the latest and greatest features. Office 365 for Mac users might well be confused about compatibility with their MacOS. Thanks for joining us! You'll get a welcome message in a few moments.