Hi Gordon Allen,
Thank you for posting your question in the Microsoft Q&A forum.
After doing some research, I found this article: https://support.microsoft.com/en-us/office/turn-off-copilot-in-microsoft-365-apps-bc7e530b-152d-4123-8e78-edc06f8b85f1
It explains how to locate Copilot under the Authoring and Proofing Tools section to disable it. You may review that guidance. However, when I tested on Word for Mac version 16.102, I could not find the Copilot option as described.
If you only need to remove the Copilot button in Word for Mac, you can customize the ribbon as follows:
- Open Word and go to Preferences > Ribbon & Toolbar.
- Under Main Tabs, select Home, then locate the Assistance group.
- Select the Assistance group and click the < (Remove) button.
- Click Save to apply the change.
If you are an IT admin and your organization does not require Copilot, you may consider switching your business subscription to a plan that does not include Copilot, such as Microsoft 365 Business Basic. You can review subscription options here: https://www.microsoft.com/en-us/microsoft-365/business/microsoft-365-plans-and-pricing
Hope this helps.
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