Emmanuel "Mac" Raboy was born in New York City. He began his art career with the Works Progress Administration during the Great Depression. He started out in comics in 1940, working for the Harry 'A' Chesler studio, which produced comic material on contract for other publishers. He also worked on a variety of assignments for Fawcett Publications.
Raboy is best known for his efforts on 'Captain Marvel, Jr' which debuted in September, 1941. In 1944, he left Fawcett to join Spark Publications, where he drew the 'Green Lama' until 1946. In the spring of 1948, he signed on with King features to illustrate the 'Flash Gordon' Sunday page, and continued drawing the strip until his death in December, 1967.