Apple Computer' s personal computer based on the POWERPC, introduced on 1994-03-14. Existing 680x0 code (both applications and device drivers) run on POWER Macintosh systems without modification via a Motorola 68LC040emulator. The performance of these unmodified applications is equivalent to a fast 68040-based Macintosh, e.g. a fast Macintosh Quadra. The POWER Macintosh runs {Macintosh operating system} from {System 7.5} to {Mac OS} 8.5. Latest version, as of 2003-11-26: POWER Mac G5. POWER Mac Start . (2003-11-26)