Texas woman says a McMuffin changed her life. Now she’s suing McDonald's facing class-action lawsuit over McRib A class-action lawsuit has been filed in the state of Illinois by a group of plantiffs who say McDonald's lied about what the McRib is made of. Fox - 5 Atlanta A woman is suing McDonald’s over a Sausage Egg McMuffin that she says left her “violently ill” and permanently “unable to perform work as she was accustomed to do,” according to a lawsuit filed in New York in May.