Mac is a pioneering influence in the church planting movement. In 1997, he planted Carolina Forest Community Church (Myrtle Beach, South Carolina). In 2004, he began serving as Leadership Development Pastor at Seacoast Church (Charleston, South Carolina) where he served for over six years. In July 2010, Mac Lake joined with West Ridge Church to become the Visionary Architect for the LAUNCH Network. In 2015 Mac begin working with Will Mancini and Auxano to develop the Leadership Pipeline process. He joined Auxano full time in 2018.
Mac and his wife, Cindy, live in Charleston, South Carolina and have three children, Brandon, Jordan and Brianna.