#Analysis

At WWDC in June 2020, Apple announced that the Mac would move from Intel processors to chips of its own design. It was the Mac's third major processor transition, after the move from Motorola 68000 chips to PowerPC in the 1990s and the switch to Intel in 2006.

The first result was the M1 in November 2020. It put the CPU, GPU, Neural Engine and memory into a single system on a chip. Because memory is shared among all the processing units, data does not have to be copied between separate pools, and Apple calls this unified memory architecture.

Early iPhones used processors designed by other companies, including Samsung chips based on ARM designs. Apple's decision to build its own began in earnest in 2008, when it acquired the chip design firm P.A. Semi. In 2010 it bought Intrinsity, which added further expertise.

The A4 debuted in the original iPad in 2010 and the iPhone 4 the same year. It was the first system on a chip Apple could call its own, even though it still used ARM building blocks.

Over the next few years Apple grew its chip team and published steady gains. The A7, in the iPhone 5s in 2013, was the first 64-bit processor in a smartphone, which caught rivals off guard.