 Mace produced hundreds of films, many of them for the military, in a career spanning decades.During the post World War II period he worked on numerous projects with his mentor, producer Louis de Rochemont, notably on Alfred L. Werker's quasi-biographical "Lost Boundaries", which was one of the first U.S. films to feature black actors in professional positions, and which was banned in Atlanta and Memphis.He was also involved in the production and story development of the 1954 Joy Batchelor and John Halas animated adaptation of "Animal Farm".