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Mac OS X Internals: A Systems Approach by Amit Singh

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Chapter 3Inside an Apple

Apple initiated its transition from the 68K hardware platform to the PowerPC in 1994. Within the next two years, Apple’s entire line of computers moved to the PowerPC. The various PowerPC-based Apple computer families available at any given time have often differed in system architecture,[1] the specific processor used, and the processor vendor. For example, before the G4 iBook was introduced in October 2003, Apple’s then current systems included three generations of the PowerPC: the G3, the G4, and the G5. Whereas the G4 processor line is supplied by Motorola, the G3 and the G5 are from IBM. Table 3–1 lists the various PowerPC processors[2] used by Apple.

Table 3–1 Processors Used in PowerPC-Based Apple Systems

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