Career
He has worked with Shakira, One Direction, The Wanted, Westlife, Susan Boyle, Il Divo, JLS, Kelly Clarkson, Leona Lewis, The Saturdays and James Blunt. Mac has collaborated with songwriters Wayne Hector, Ina Wroldsen, Benny Blanco, John Newman, Ammar Malik, Ross Golan, Charli XCX, Karen Poole, Lindy Robbins, Lily Allen, Emeli Sandé, Jason Derulo.