Mac began a committed yoga practice in 1994. On January 7, 2002 she opened the Niyama Yoga studio. Niyama Hot Yoga™ was developed in her Sunday 4:30 class in 2006 . Mac says:
"Yoga belongs to each one of us. No teacher holds the key to your bliss. The more you listen to your body speak, the more you let your breath guide you - both on your mat and out in the world - the more surely you will find your bliss. You will relieve your suffering and the suffering of those around you. Follow that inner teacher and you will live in freedom."