Microsoft Office 365 for MacOS BigSur version 11.7.11

Busra Bicak 25 Reputation points
2026-07-31T10:17:27.35+00:00

I'm using MacOS BigSur version 11.7.11 and I have problem to use microsoft office programs. I have a Microsoft 365 A3 for students account. I normally used 16.77 version but now on I cannot used anymore. What can I do for properly using office programs in my old Mac.

Microsoft 365 and Office | Install, redeem, activate | For education | MacOS
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DaveM121 (2) 16,385 Reputation points Volunteer Moderator
2026-07-31T10:53:13.34+00:00

If your version of MacOS is Big Sur, then the error you are seeing is caused by an update on the 13th of July, many people are seeing the exact same error, if you are unable to upgrade your MacOS to a newer compatible version, your Office apps will go into Read Only mode, on the link below the full details on that update are provided.

https://support.microsoft.com/office/update-microsoft-365-or-office-on-your-macos-or-ios-device-f418ae5d-bb5f-4078-b3d9-9340f5dd084e

The old workaround of installing an older version of the Office apps no longer works after the changes they made in that update.

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