He graduated from Salpointe Catholic High School in 1986 and attended the University of Arizona from 1986 to 1991, where he graduated with a dual major of Bachelor of Arts, Magna cum laude in Creative Writing and Bachelor of Fine Arts, Magna cum laude & Honors in Media Arts.
Mac began stand-up comedy at Laff"s Comedy Club in Tucson in 1993, although he was a Top Ten Finalist in Billy Crystal"s Mr. Saturday Night comedy contest in 1992. In 2001, Mac was a Finalist in the San Francisco International Comedy Competition.
In 2007 he was a Finalist in the Boston Comedy Festival and appeared in the inaugural Great American Comedy Festival in 2008.
In 2007, Mac launched a presidential campaign as part of the alternative newsweekly Tucson Weekly"s Project White House, wherein the paper assisted would-be candidates in registering to be on the state"s Presidential Primary ballot. Mac registered for the Arizona primary as a Democratic Party candidate.
In 2008, Mac appeared on Season 6 of National Broadcasting Company"s Last Comic Standing, where he was eliminated in the first round. He was, however, featured in a spotlight segment in the episode.
He has performed with Robin Williams, Adam Sandler, Larry the Cable Guy, Margaret Cho, Patton Oswalt, and Victoria Jackson.
In 2001, Entertainment Business Journal ranked Mac 67 out of the top 100 stand-up comedians in the United States.
Mac started and operates a comedy walking tour business in San Francisco called FOOT! Tours, which combines history and comedy in a game show format. Mac has a staff of comedians and performers who host the tours. He continues to tour the country, performing at comedy clubs and casinos throughout the western United States.