Apple adds a Low Power Mode to macOS Monterey and iPadOS 15, and says that, on the Mac, enabling it reduces the system clock speed and the display brightness
Juli Clover / MacRumors :
Context & Ripple Effects
Low Power Mode has existed on the iPhone since iOS 9 — where benchmarks showed roughly a 40% performance drop when enabled — but the Mac and iPad have never had a user-facing equivalent. Its arrival in macOS Monterey and iPadOS 15 closes that gap, and it lands as part of a broader power-management build-out: macOS 10.15.5 introduced Battery Health Management for Thunderbolt 3 MacBooks the year before, and Apple had just clarified how AirPods Max step down through low- and ultralow-power states.
What makes this worth watching is that Apple is formalizing power as a switchable OS-level mode rather than automatic background behavior — and the arc eventually runs in the other direction too, when [[a:879136|the High Power performance mode once reserved for Max chips reached the M4 Pro in the Mac mini and MacBook Pro]].
First-order effects
- MacBook and iPad users can now trade peak speed for runtime at will; on the Mac, enabling the mode directly cuts system clock speed and display brightness, so compute-bound workloads and screen-driven tasks slow down immediately.
Second-order effects
- Benchmark and review methodology splits: reviewers testing Macs and iPads must report figures for both power states, the way iPhone testing has accounted for Low Power Mode since the iOS 9 era.
Third-order effects
- If the pattern holds toward the M4 Pro's High Power mode, Apple is positioning the performance envelope itself as a software-controlled setting across the product line — the same silicon serving efficiency-first and performance-first profiles by mode rather than by model.
The trend: Apple is converting power management from invisible firmware behavior into explicit, user-selectable operating modes spanning its whole device lineup.