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Office for Mac Issues

Microsoft Office Compatibility with macOS Big Sur on Older MacBooks

Maira MehtabMaira Mehtab Sep 20, 2026 868 views

Question details

The user needs to determine whether Microsoft Office 2021 or Microsoft 365 is compatible with macOS Big Sur (11.7.10) on an older MacBook Air, and whether purchasing a new computer is necessary after their educational account expired.

Product
Microsoft Office for Mac
Device & OS
macOS Big Sur 11.7.10 (2014 MacBook Air)
Scenario
Choosing and installing a compatible version of Microsoft Office after an educational license expires on an older Mac.
Observed behavior
The current Office installation has expired, prompting the user to identify the correct Office license and compatible software version for an older macOS.
Before you start

Verify your current macOS version by clicking the Apple menu and selecting 'About This Mac' to confirm you are running macOS Big Sur.

Solution 1Recommended

Download and Activate Office for Mac Version 16.77

Install the final compatible version of Microsoft Office for macOS Big Sur without needing to purchase a new computer.

If your MacBook Air is running macOS Big Sur, you do not need to buy a new computer. You can install a legacy build of Microsoft Office that fully supports this operating system.

1
Purchase a License

Buy a Microsoft 365 Personal subscription or an Office 2021 perpetual license through the official Microsoft store.

2
Download Version 16.77

Locate and download the Microsoft Office for Mac version 16.77 installer, which is the last officially supported release for macOS Big Sur.

3
Install and Activate

Run the installer package, then launch Microsoft Word. Sign in with the Microsoft account associated with your newly purchased license to activate the software.

Update Limitations: While version 16.77 works smoothly on Big Sur, it is the final compatible version and will not receive future feature or security updates from Microsoft.
Free Microsoft Office alternative

Use WPS Office on Your Older Mac for Free

Avoid expensive subscriptions and compatibility headaches on your 2014 MacBook Air. WPS Office is a free, lightweight, and fully compatible alternative to Microsoft Office that runs smoothly on older macOS versions.

  1. 1. Download WPS Office for Mac: Visit the official WPS website and download the macOS version.
  2. 2. Install the Application: Open the downloaded .dmg file and drag the WPS Office icon to your Applications folder.
  3. 3. Open Your Files: Launch WPS Office and immediately open your existing Microsoft Office files with full compatibility.
100% compatible with Microsoft Word, Excel, and PowerPoint formats.Lightweight design ensures smooth performance on older MacBooks.Free to use without requiring an educational or premium subscription.All-in-one interface for easily managing documents, spreadsheets, and PDFs.
microsoft office alternative - wps office

Frequently Asked Questions

Do I need to buy a new computer to use Microsoft Office on macOS Big Sur?

No, you do not need a new computer. You can continue using your 2014 MacBook Air by installing Office for Mac version 16.77, which is fully compatible with macOS Big Sur.

Will Office for Mac version 16.77 receive updates?

Version 16.77 is the final supported release for macOS Big Sur. While it will continue to function normally, it will no longer receive new features or security updates.

Can I use Office 2021 on multiple devices?

No, Office 2021 provides a perpetual license for only one device. If you need multi-device support, consider a Microsoft 365 subscription, which covers up to five devices.

What should I do if my university Office account expires?

Once your university account is closed, your Office software will expire. You will need to purchase a personal license, such as Microsoft 365 or Office 2021, and activate it using your personal Microsoft account.