the name rhapsody followed a pattern of music-related code names that apple designated for operating system releases during the 1990s. another next-generation operating system, which was to be the successor to the never-completed copland operating system, was code-named gershwin after george gershwin, composer of "rhapsody in blue". copland itself was named after another american composer, aaron copland. other musical code names include harmony (mac os 7.6), tempo (mac os 8), allegro (mac os 8.5), and sonata (mac os 9).