Le prophète
In 2004 he became principal guest conductor of the Philharmonia Orchestra. He was also principal guest conductor of the Czech Philharmonic. With the Royal Opera, he conducted productions of Gounod's "Roméo et Juliette" and Handel's "Semele". Mackerras also had a long association with the Metropolitan Opera, where he conducted "The Makropulos Case", "Káťa Kabanová", "Le prophète", "Lucia di Lammermoor", "Billy Budd", "Hansel and Gretel" and "The Magic Flute".