In 2014, she began grassroots organizing with the help of Feminista Jones, with whom she organized a National Moment of Silence (#NMOS14) vigil in the wake of Michael Brown's shooting death in Ferguson, MO. Mac then founded the Ferguson Response Network in 2014 to help train people in peaceful protest, and transitioned into full-time organizing. She has helped organized events such as the Reclaim MLK March in Philadelphia on January 20, 2015.