Complex sentence: Apple Macintosh computers were initially built with the Motorola 680x0 family of processors, then switched to the PowerPC series; in 2006, they switched to x86-compatible processors made by Intel.
Split into simpler sentences: Apple Macintosh computers were initially built with the Motorola 680x0 family of processors, then switched to the PowerPC series. In 2006 they switched to x86-compatible processors by Intel.