Born in New York City, he entered Princeton from Deerfield Academy. He was manager of the varsity squash team for two years, belonged to Cottage Club, and majored in history.
Mac’s business career was in the financial world, where he worked for several Wall Street firms selling securities. When he retired in 1987 to pursue other business activities, he was a vice president of Bacon, Whipple and Co., a New York investment bank.
He married Honor Banks, a Barnard graduate, in November 1950. After briefly living in New York City, they moved to Long Island, where they established their permanent residence. In recent years they spent time in Florida.
Mac enjoyed deep-sea fishing from his boat during summer weekends, and duck hunting in the winter. He was a village trustee, member of school boards, and active on conservation committees. He served as New York State chairman of Ducks Unlimited.
A devoted Princetonian, Mac was our 10th-reunion chairman and class president from 1960 to 1965.
Mac is survived by his wife, Honor; their sons, Putnam and Malcolm Jr.; daughters Katrina and Sarah; and six grandchildren. Their daughter Honor died in 2013.