painter and teacher who, with Morgan Russell (Russell, Morgan), founded the movement known as Synchromism about 1912. Synchromism proclaimed colour to be the basis of expression in painting, and, although the movement was short-lived, it proved to be the first abstract art movement developed by American artists.

In 1907, after two years at the Los Angeles Art Students League, Macdonald-Wright went to Paris, where he studied the colour theory of the optical scientists Michel-Eugène Chevreul (Chevreul, Michel-Eugène), Hermann von Helmholtz (Helmholtz, Hermann von), and Ogdon Rood. He was also influenced by the art of Paul Cézanne (Cézanne, Paul) and the abstractions of the Cubist (Cubism) painters.

The first Synchromist exhibition was held in Munich, Germany, in June 1913 and featured the work of Macdonald-Wright and Russell. In his early works, Macdonald-Wright chose traditional subjects and rendered them in a representational manner, but his use of vibrant colours was experimental. Eventually his paintings became absolute colour abstractions. By 1920, however, his art had become a compromise between Synchromist abstraction and a traditional, representational style. His attention eventually turned away from painting and toward filmmaking, writing, and teaching art history at the University of California. During the Depression, Macdonald-Wright resumed his painting and directed and executed Works Progress Administration (WPA) compositions in the realistic style of American Regionalism. Of these, his murals for the Santa Monica City Hall and Public Library (1935) are the most notable.