McBean attended numerous schools during the time of World War I.
Early in his career McBean was a maskmaker. He designed and printed wallpaper as well as doing interior decoration and restoration. After a stint as a bank clerk, at the age of twenty Angus went to work in the antiques and decorating departments of Liberty &. Company in London, United Kingdom, and left their employ seven years later.
From 1930 to 1970 Angus was a photographer of British theater. In 1935 McBean opened a studio in London, United Kingdom, that has specialized in theater photography, selling to such periodicals as Sketch and covering almost all London stage shows until 1971.
McBean said about his work: "My life's work has been given to add a minute scrap to the gaiety of nations and their strife, and to record what little beauty and happiness and achievement we have...I don't believe that atrocity photographs do anything to relieve the world malaise: photography can only prettify even violent death and, by repetition, make ordinary and everyday such horrors."