Mac McCormick apprenticed from 1965 to 1967 with Leo Erickson, a notable luthier, in Omaha, Nebraska. He then founded his own business McCormick Guitars, and moved his shop from Ralston, Neb., to San Jose, Ca., Lubbock, Tx., and in 1987 he settled in Columbus, Georgia.  McCormick loves to make instruments from scratch and has made over 350 instruments, no two exactly the same.

Source: McCormick Guitars website (6 March 2018)