A Louisville native, King’s two grandfathers were magicians and King gained an interest in magic at an early age. He checked out a book on magic in his school library and as a child, performed magic shows for his family and friends. By the age of ten, he had performed his first paid show at a friend's birthday party.
King graduated in 1981 with dual degrees in Magic and Anthropology from Macalester College in St. Paul, Minn. In the 1990s, King began appearing regularly on NBC-TV's "The World's Greatest Magic Shows." While filming these shows at Caesars Palace in Las Vegas, he caught the attention of local bookers for casino showrooms. Soon after, King began to appear in local shows such as: "Spellbound" at Harrah's Las Vegas, "The Great Radio City Music Hall Spectacular" at The Flamingo, "Splash!" at the Riviera, and with comedian Rita Rudner at The Desert Inn.
In 2000 King began his full-time, one-man show "The Mac King Comedy Magic Show" at Harrah's Las Vegas. The show was awarded the "Best Bargain Show" for seven years in a row (2003-2010) in the Las Vegas Review Journal's "Best of Las Vegas" poll. King received the "Entertainer of the Year" award in the Las Vegas Weekly's 2004 "Reader's Choice Awards." He was named "Funniest Act in Magic Today" by Magic Magazine in 2008 and "Magician of the Year" in 2004 by the Academy of Magical Arts (Magic Castle).
In June 2004, King launched "Magic In a Minute" -- a Sunday comic strip that runs in major national newspapers, which led to magic toys, magic sets and instructional videos that are sold in major box retailers nationwide.
King debuted his first book Great Big Ol' Book-O-Magic in 2007, a magic book for kids. In 2009 Suitcase-O-Magic -- a miniature suitcase filled with magic tricks and instructions -- hit store shelves. King recently released his latest book Mac King's Campfire Magic in March 2010.