Can’t Open Microsoft Office Files in MacOS Sequoia? Fix Microsoft Word, Excel, Office File Associations

After MacOS Sequoia is updated, some Mac users find that Microsoft Office files (Word documents, Excel tables, PowerPoint presentations, etc.) cannot be opened in the expected app or cannot be correctly associated with the corresponding Microsoft Office app. Worse, some users report that when trying to open a Microsoft 365 or Microsoft Office file on your Mac, you may see a warning message similar to "MacOS cannot verify that DocumentName.docx is free of malware."

The problem of opening Microsoft Office files in MacOS Sequoia is frustrating, but luckily, this is a very easy solution. Just use this trick to change the default application for opening file type on your Mac, a long-standing trick.

How to open Microsoft Office/Word/Excel files in MacOS Sequoia

1. In Finder, find any Word document (.docx file), and press Command I, or select Show Introduction from the File menu.

2. Expand the Open With section, select Microsoft Word as the default file type to open the docx file, and then select Change All.

3. Repeat this process for Excel (.xlsx or .xls files), PowerPoint (.ppt files), and other Microsoft Office files if necessary.

After reassociating the file type with the expected Microsoft Office app, the file should open as expected.

Some readers have encountered this problem, and I have also encountered it, although my association is Apple's Pages and Numbers apps, which is not a big problem for me. This issue is also discussed in Apple forums and Tidbits. It is not clear why some MacOS Sequoia users using Microsoft Office, Word, Excel, PowerPoint, and 365 are affected, while others do not.

This may be a bug related to Microsoft apps or MacOS Sequoia, or it may be a slightly strict expected behavior in terms of security. Anyway, associating files with the correct application should fix this. In case of a bug fix released, it is best to always update your MacOS system software and Mac apps to the latest version.

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