A founding member of the band Beolach, Mac has continued to perform his innovative Cape Breton piano style while touring and recording full time with Natalie MacMaster for nearly the last two decades. He has also appeared live and recorded with The Rankin Family, Yo-Yo Ma, Buddy MacMaster, and The Chieftains, and has recorded on many of the traditional projects produced in Cape Breton in the last twenty years. Mac also continues to travel as a guest with the Scottish group Dannsa. As a well-known and respected dancer at home and abroad, Mac has traveled throughout Canada and the USA, the UK, Europe and New Zealand to teach traditional Cape Breton style steps.