Over the course of her career as an artist McKean painted more than 300 works and was represented in four solo shows in New York City. She was represented in more than 130 exhibitions around the world, including a solo retrospective at Dana Hall in 1966. In addition to her art, McKean was a dedicated volunteer and philanthropist. One notable contribution to the art world was convincing her husband to buy the surviving artworks of the late Louis Comfort Tiffany, after a fire destroyed his former mansion, Laurelton Hall on Long Island. The objects were painstakingly restored and a new wing created for them at the Charles Hosmer Morse Museum of American Art in Winter Park, Florida, founded by the McKeans in 1942. It is said to be the most comprehensive collection of Tiffany’s work in the world.