Born in Brno, now in the Czech Republic, he graduated from Vienna University and studied medicine for two years, at the same time taking a course in music and composition under Seyfried. He had breathed a musical atmosphere from his youth, and finally decided to devote himself wholly to its pursuit. The Emperor of Austria became interested in him, as did von Bülow, Wagner, Liszt, Offenbach and Strauss. In 1843 his first opera, Hamlet, was produced at Brunn. He played the violin in orchestras in both Germany and England. He then travelled through Germany, France, and England, as an orchestral conductor, and in 1844 settled in London as assistant to Michael William Balfe at Her Majesty's Theatre.
Coming to the United States in 1848, he became musical director at Edward P. Fry's Astor Opera House. In 1849 he began his career as an impresario at the same house with an opera company of his own which included most of Fry's artists. Between 1848 and 1850, he produced L'Elisir d'Amore, Il Barbiere di Siviglia, I Puritani, Belisario, Ernani, Otello, Maria di Rohan, Don Pasquale, and Der Freischütz. During the summer of 1850 Maretzek produced opera in Castle Garden, New York, producing Luisa Miller for the first time in America. The Academy of Music was opened in 1854 with Giulia Grisi and Giuseppe Mario under Maretzek. In 1855, Il Trovatore was produced by him, also for the first time in America, with Pasquale Brignoli as Manrico. He suffered a temporary setback with the arrival of Jenny Lind to America, as he lost audiences to her concerts. In 1856 Maretzek started an opposition to Niblo's Garden, with Clara Louise Kellogg. Adelaide Phillips, Pasquale Brignoli, and others. The competition was strong and neither side prospered. Although Maretzek brought out Giorgio Ronconi, one of the greatest baritones, he was driven to Philadelphia. In 1860 he returned to the Astor Place Opera House, and worked at Niblo's Garden in New York, the Crosby's Opera House in Chicago, and in Mexico and Havana. For a period in the late 1860s he managed the American career of newly arrived Czech actress Fanny Janauschek who early in her career spoke no English.
Maretzek has been described as being possessed of a violent personality, dictatorial and intransigent, and was frequently in disagreement with members of his company and with critics. As a composer, he wrote two operas, Hamlet in 1843 and Sleepy Hollow in 1879. The first was produced in Germany, the second in the United States. He also wrote two volumes of memoirs, Crotchets and Quavers (1855) and Sharps and Flats (1890). He died in Pleasant Plains, Staten Island, New York in 1897.
- Werner's magazine, Vol.19 p.561 (1897) Music Teachers National Association, (Digitized by Google Books) 
- Wilson, James Grant; Fiske, John, eds. (1900). "Maretzek, Max". Appletons' Cyclopædia of American Biography. New York: D. Appleton.
- Max Maretzek (1855) Crotchets and quavers: or, Revelations of an opera manager in America, Samuel French, New York (Digitized by Google Books)
- Max Maretzek (1890) (copyright 1889) Sharps and flats, American Musician Publishing Co., New York (Digitized by Google Books)
- Further reading
- David Ewen, (1963) Encyclopedia of the Opera: New Enlarged Edition, Hill and Wang, New York
- Katherine K. Preston (2000) Opera on the Road: Traveling Opera Troupes in the United States, 1825-60, University of Illinois Press, ISBN 0-252-01974-1,