Rostrum president Benjy Grinberg knew Mac for a while before he signed him. When they first met at I.D. Labs recording studio, Grinberg would give the young rapper advice but that was all. Once Mac started to work on his K.I.D.S. mixtape, Grinberg was so impressed he decided to sign him in 2010.
Rostrum Records Wasn't Initially Interested in Signing Him