Cannot edit groups in Contacts 2498.5 in OS Monterrey 12.6.3

Hey there revgirrl,

Upon researching your question, we were able to find the steps to take in macOS Monterey for removing/adding people in a group conversation: Manage a group conversation in Messages on Mac

If those are the steps you're already trying to take for editing your group conversation contacts, we'd like to learn more about what's happening, along with ruling out some possible causes:

1. Besides the error ping sound, do you see anything occur in Messages?
2. When did this start to occur, or is this the first time you've tried changing the contacts in your group conversation?
3. Does this occur in all group conversations, or only one specific one?
4. Sometimes unexpected behavior can be resolved with a restart. Check out the section ‘Restart your Mac' here: Shut down or restart your Mac

Cheers!

Hello revgirrl,

If you are having issues with editing groups in Contacts on your Mac, first ensure you are following these steps from Create and change groups in Contacts on Mac - Apple Support

Add contacts to a group

1. In the Contacts app  on your Mac, select one or more contacts listed in the sidebar.

2. There’s no limit to the number of contacts you can add to a group. If you use more than one account in Contacts, make sure the contacts you select are in the same account.

3. Drag the selected contacts to a group in the sidebar.

4. If the contacts aren’t added to the group, check if it’s a Smart Group—you can’t add contacts to a Smart Group.

If you use an Exchange account in Contacts, those contacts can belong to only one folder at a time. Any contacts that aren’t in a folder you create are in the default Exchange Contacts folder.

Remove contacts from a group

1. In the Contacts app  on your Mac, select the group in the sidebar.

2. Select the contacts you want to remove from the group.

3. Press the Delete key on your keyboard.

4. Click Remove from Group.

5. If you want to delete the contacts from the Contacts app, click Delete.

If this is what you are doing and this continues, let us know which account or accounts these contacts are synced with and if it occurs in every account and group or only specific ones. That will allow us to isolate what's happening further.

Take care.

Hello revgirrl,

Thank you for getting back to us. At this point, we would recommend you contact Apple Support directly to continue with this issue: Apple Support

Best regards.