Former peermusic signing Mac boasts a career total of 58 Number One singles and albums and sales of over 140m records.
His debut as a writer was on his second ever production, Gonna Give You Devotion, which reached number two in the UK charts in 1991. Since then among the artists he has worked with are The Wanted, One Direction, Susan Boyle, Westlife, Boyzone, Kelly Clarkson, Il Divo, Leona Lewis and JLS.
Mac has writing credits on 10 UK Top Ten hit singles in the past 18 months including:
? The Wanted - 'Glad You Came'
? Cobra Starship - 'You Make Me Feel'
? One Direction - 'Gotta Be You'
? Cover Drive - 'Sparks'
? The Saturdays - 'Notorious'.
Steve Mac's latest US hits are 'You Make Me Feel....' by Cobra Starship (now over 2.4 million downloads) and 'Glad You Came' by The Wanted (3 million downloads).
BMG Chrysalis UK Vice President of A&R Ben Bodie said, "We are delighted to be working with Steve Mac. His strike rate of hits is truly phenomenal. We are looking forward to demonstrating the value BMG's team can add."
Steve Mac said, "I'm very excited to join the BMG Chrysalis family and to seek more opportunities internationally."
David Howells, Steve Mac's manager, said, "BMG Chrysalis impressed us above all with the quality of their team and the very close integration of their creative team in their offices across the world. We believe that teamwork will make a difference as Steve continues to grow and develop his talent. We believe the best is yet to come."
Alexi Cory-Smith, Senior Vice-President of BMG Chrysalis UK, said, "Steve Mac is a marquee signing. We are particularly pleased to welcome him in a week in which BMG Chrysalis has shares in all top three singles."
Pick up today's new Music Week for the full story and more exclusive reaction from all parties.