Mac Sabbath is a unique band created by a spin off of the McDonaldland TV commercials and the band "Black Sabbath". The members of Mac Sabbath go by the names Ronald Osbourne, Slayer MacCheeze, Grimalice and The Catburglar, without any additional identification.
The band has their own website that lists extra information about themselves, including their concert dates and locations. (https://www.officialmacsabbath.com/)