Mack was born in Elgin, Kershaw County, South Carolina, and is the youngest of four children.
[10] Also in 2015, he danced with the English National Ballet as a guest artist, and toured with the company to Palais Garnier, Paris.
[4] In 2018, Mack left the Washington Ballet due to disagreements with the new management over salary, workload, and guesting opportunities.
[11] In June 2019, he appeared in American Ballet Theatre's Le Corsaire as Conrad and Ali, after artistic director Kevin McKenzie's assistant contacted him via Instagram.
[1] In August 2019, he returned to English National Ballet as a guest artist, and stayed until January 2020, during which time he danced Le Corsaire, Christopher Wheeldon's Cinderella and the company's 70th anniversary gala.