Office 365 for Mac users need to be on Sierra or High Sierra starting in September August 23, 2018 by admin Tweet Microsoft announced that all Office 365 users must run macOS 10.12 or later starting next month, in order to update to the new version of the Office 365 for Mac and get the upcoming feature updates. Read more… Neowin Related Posts:Apple's latest return-to-office deadline is September 5Microsoft launches Office 2024 for consumers…The new Aptos Microsoft Office font will officially…Office updates iOS, Android apps – Windows 10 apps…Switching between multiple Office accounts coming to…