can't add a member to a group conversation

Hello lka1949,

Thanks for asking about adding people to a group message on a Mac.

Please verify everything here: Manage a group conversation in Messages on Mac - Apple Support

"Add a person to a group conversation

You can add people to a group conversation, even after the conversation has started. 

Note: You can only add people to a group conversation; you can’t add anyone else to a conversation with one person.

1. In the Messages app  on your Mac, select a group conversation.
2. Click the Details button , then click Add Member.
3. Enter the contact information for the person you want to add.
4. Note: If you’re restricted to sending and receiving messages with only certain people, an hourglass icon  appears next to those people you can’t send messages to.

When you add a new person to a group conversation where you’re collaborating on a project, you have to grant them access to the project—click Review at the top of the conversation."

Are you seeing the requirements? "Note: You can only add people to a group conversation; you can’t add anyone else to a conversation with one person."

Are you seeing the hourglass?

Thanks.

I think it’s because it’s an android phone and not an iPhone. The number isn’t registered for iMessage.

Thank you Eric. I have already done this. When I add the name, the bubble turns pink and nothing else happens. It’s only for this one name. I can’t see anything different from the other contacts on the list.