For example, if you’re on macOS Big Sur 11, but later you don’t update your macOS to a supported version when macOS Big Sur 11 is no longer supported, you won’t receive any updates of any kind.Īs new major versions of macOS are released and older versions become unsupported, we highly recommend you continue to update your macOS to a supported version in order to receive mainstream support such as security updates as well as new features. If you’re on an unsupported version of macOS, your Office apps will still work but you would no longer receive any updates including security updates. What if I don't update macOS to a supported version? Learn more about the latest macOS releases. The October 2022 update (16.66) is the last build to support macOS Catalina 10.15. Note that new installs of Microsoft 365 for Mac also requires macOS Big Sur 11 or later. Upgrading your operating system to macOS Big Sur 11 or later will allow Office updates to be delivered for your apps. If you continue with an older version of macOS, your Office apps will still work, but you'll no longer receive any updates including security updates. Starting with the November 2022 update (16.67) macOS Big Sur 11 or later is required receive updates to Word, Excel, PowerPoint, Outlook, OneNote, and Defender.

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