Complex sentence: Current Mac CPUs use Intel's X86-64 architecture; the earliest models (1984--1994) used Motorola's 68k, and models from 1994 until 2006 used the AIM alliance's PowerPC.
Split into simpler sentences: Current Mac CPUs use Intel's X86-64 architecture. The earliest models (1984--1994) used Motorola's 68k, and models from 1994 until 2006 used the AIM alliance's PowerPC.