20 years of Intel Macs: why Apple switched, and why it switched again
The summer of 2026 marks the 20th anniversary of one of the most unusual platform transitions in computing history. In 2006, Macs moved from the PowerPC architecture to Intel x86; 14 years later, Apple did the reverse, again.
Ars Technica's retrospective reads these two pivots in parallel. The hero of the first switch was Steve Jobs, who announced from the stage a step that 'Apple's most loyal fans never thought would happen'.
The PowerPC architecture had reached a dead end by then. Chips jointly developed by IBM and Motorola were lagging Intel in performance per watt. PowerBooks — Apple's portable line — were grappling with heat and battery life problems in particular.
Moving to Intel was a strategic choice for Apple. The Windows ecosystem ran on the same chips and was pouring unprecedented investment into the x86 roadmap. Apple wanted to ride that roadmap on performance, price and energy efficiency.
The transition itself was strikingly smooth. Apple shipped a translation layer called Rosetta, so older PowerPC apps could run on Intel Macs. Within a year, developers had largely shipped native Intel-compatible builds.
The Intel era ran from 2006 to 2020 and coincided with the golden age of the MacBook Air, the Retina MacBook Pro, the Mac mini and the iMac. Apple's share of the PC market grew durably over that span.
But the seeds of the second transition were already in the ground. With the iPhone, Apple had started designing its own chips; the A-series climbed every year in performance per watt. By 2020, the M1 was outperforming traditional x86 laptops on several metrics.
The rationale for moving to Apple Silicon was almost identical to the one for leaving PowerPC: controlling the roadmap. With Intel running into multi-year manufacturing problems and AMD turning up the competitive heat with Ryzen, Apple chose once again to cut a dependency.
A general pattern emerges. Apple revisits its strategic dependence on third-party architecture partners roughly every decade. The real lesson of the Intel-Mac transition is that nothing in computer architecture is truly 'forever'; each platform shift carries forward both the wins and the risks of the previous decade.
Vesper presents this piece as computing history. For current Mac purchase decisions, official Apple support and compatibility lists remain the most accurate source.
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