Hello, Margaret McDonald1
Welcome to Microsoft Community.
I realize that you have encountered a problem with copying and pasting in Word documents on Mac. I understand how you feel.
Here are some steps you can try:
1. Update Word.
Open Word > click Word in the upper-left corner > n the top menu, select Help> Check for Updates.
- Please try to create a new Mac user.

For more information, see: Add a user or group on Mac - Apple Support (SG)
Disclaimer: Microsoft makes no warranties and/or guarantees, implied or otherwise, and is not responsible for the information you receive from the linked third-party sites or any technology-related support.
After creating a new Mac user, log in to your Mac computer with this new Mac user and see if the same issue persists in Word.
Additionally, due to limited information and various possible reasons for the problem, we may require more detailed information from you.
- Which Office product do you have? For example: Microsoft 365 Personal subscription? Microsoft 365 Family subscription?
- Your Office version. Open Word > click Word in the upper-left corner > click About Word. There may be a compatibility issue.
- When you copy and paste, do you use the keyboard shortcuts (Command + C/V)? Or do you right-click with the mouse and select “Copy” and “Paste”? Neither method works for copying and pasting?
Please understand that our initial response may not always solve the problem immediately. Feel free to post back if you need further assistance. Let's take it step by step.
Best wishes,
Lucia Wu - MSFT | Microsoft Community Support Specialist