Dear Kyfaa,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
We understand that you're facing an issue with documents being unexpectedly locked and not opening in Word for Mac. We apologize for any inconvenience this has caused and appreciate your patience.
To help you better, we would like to collect more detailed information you're experiencing for further investigation:
- Are you seeing any error prompts when trying to open these documents? If possible, please share screenshots of the issue you're encountering.
- Are the files saved on your Mac or in a cloud service such as OneDrive or SharePoint?
- Were the files created by you or shared by other users?
- Are the files protected or password-protected?
- Additionally, please share your macOS and Office version with us. For the Office version, you can navigate to Word > About Word and take a screenshot as shown below:

In the meantime, if the files are located in cloud service such as OneDrive or SharePoint, please check if same issue occurs when using the Office web app in a browser. Also, check for any error prompts when trying to access the cloud location.
We appreciate your kind patience and understanding that sometime the initial reply may not resolve the concern immediately or there may have some misunderstanding about your scenario, we would like to hear the updates from your side and figure out further suggestions.
Thank you for your time and cooperation. We hope you have a nice day and stay safe!
Sincerely,
Rhoda | Microsoft Community Moderator