MacOS – How to add a buddy to more than one group in OS X Messages.app

macosmessagesxmpp

When sorting buddies for XMPP services (not iMessage) into different groups in the contacts window in Messages.app for OS X I can click and drag one buddy from one group to another. However this removes the 'buddy' or contact from the previous group. How do I add a buddy to two groups?

Best Answer

The Messages (Mavericks): Use buddy lists Apple support article explains how to add a contact to more than one group:

Add a buddy to more than one group: Press Option and drag the buddy to each additional group.

Hat tip to @DaveDelong.