Office Compatibility Issues

How to Open Office 365 Excel Files in Office 2016 on an Older Mac

Maira MehtabMaira Mehtab Nov 2, 2026 870 views

Question details

The user needs a way to open and edit an Excel workbook created in Microsoft 365 using Office 2016 on an older Mac running macOS High Sierra.

How to Open Office 365 Excel Files in Office 2016 on an Older Mac
Product
Microsoft Excel
Device & OS
macOS High Sierra
Scenario
Accessing newer Office 365 spreadsheet files on legacy Mac environments where upgrading the OS or Office suite is not possible.
Observed behavior
Compatibility limitations restrict the seamless opening or editing of newer Microsoft 365 Excel files within the local Office 2016 desktop application.
Before you start

Check your internet connection if you plan to use browser-based solutions, and verify if the spreadsheet relies on modern Office 365 functions like XLOOKUP which may not render in older versions.

Solution 1Recommended

Use Microsoft Excel for the Web via OneDrive

This is the most reliable method to access modern features without needing to upgrade your Mac's operating system or local software.

Microsoft's free web version of Excel runs directly in your browser and supports the vast majority of modern Microsoft 365 features, bypassing the limitations of your local Office 2016 installation.

1
Access OneDrive

Open your preferred web browser on your Mac and navigate to OneDrive.com.

2
Upload the Excel File

Sign in with your Microsoft account credentials. Click the 'Upload' button at the top of the page, select 'Files', and choose the Office 365 Excel workbook from your Mac.

3
Open in Web Browser

Once the upload is complete, click on the file name within OneDrive. It will automatically open in Excel for the Web, allowing you to edit it with full compatibility.

Use Microsoft Excel for the Web via OneDrive
Auto-Save Enabled: Changes made in Excel for the Web are automatically saved to your OneDrive, ensuring you don't lose any progress.
Free Microsoft Office alternative

Use WPS Office to Open Newer Excel Files on Older Macs

If Office 2016 on your macOS High Sierra struggles with modern Microsoft 365 files, WPS Office provides a free, lightweight, and highly compatible alternative. It handles modern .xlsx formats seamlessly without requiring the latest macOS update.

  1. 1. Download WPS Office: Visit the official WPS Office website and download the installation package for Mac.
  2. 2. Install on Your Mac: Open the downloaded installer and drag the WPS Office icon into your Applications folder.
  3. 3. Open the File: Launch WPS Office, click on 'Open', and select your Office 365 Excel file to begin editing instantly.
Exceptional compatibility with modern Microsoft Excel (.xlsx) formatsLightweight application that runs smoothly on older Mac operating systemsFamiliar user interface that requires zero learning curve for Office usersFree alternative to expensive Microsoft 365 subscriptions
microsoft office alternative - wps office

Frequently Asked Questions

Can I upgrade my Office 2016 to Microsoft 365 on macOS High Sierra?

No. Microsoft 365 requires a newer version of macOS to install and run. macOS High Sierra is no longer supported by the latest Microsoft 365 updates.

Why do some formulas show as '#NAME?' errors in Office 2016?

Office 365 introduced several new functions, such as XLOOKUP, FILTER, and UNIQUE, which did not exist in Office 2016. Because the older software cannot recognize these functions, it displays a '#NAME?' error.

Is it safe to save the Office 365 file in Office 2016?

You can save the file, but proceed with caution. Any newer features, dynamic arrays, or modern formatting specific to Office 365 may be permanently converted to static values or stripped out when saving from the older version.