Dear Perri Hine,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
As per your description, we're sorry to hear that you are having issue opening file in Office for Mac. For the situation you encountered, we do understand the inconvenience caused and feel very sorry about it.
To help you better, we would like to collect more detailed information you're experiencing so that we can have a further investigation:
- Would you please share your Office version by navigating to Word > About Word and take a full screenshot of it as shown below and share with us.

- Does it happen with the files saved on your Mac and online location such as OneDrive for business?
- Is Office activated with subscription under personal account like Gmail.com, Outlook.com, Hotmail.com etc. or a work/school account organized by your organization?
Meanwhile, please check if the suggestions shared in the similar threads can help.
For your reference: Word cannot open the document: user does not have access privileges - Microsoft Community
user does not have access privileges (Word for Mac) - Microsoft Community
"User does not have access privileges" - Microsoft Community
Appreciate your understanding that sometimes the initial reply may not resolve the situation very soon. However, we can work together to narrow down and resolve the situation. Please kindly post back and provide the more information, then we can focus on your specific scenario and provide specific suggestions.
If the understanding above is not consistent with yours, please feel free to post back and point that.
Your understanding and patience will be highly appreciated. We hope that you are keeping safe and well!
Thanks for your cooperation.
Sincerely,
Rhoda | Microsoft Community Moderator