WattGuard
Mac battery resources
pmset exposes macOS power information and configuration through Terminal. Start with read-only inspection, learn what the output means, and keep power-source and hardware differences in view before making any change.
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A practical guide to read-only pmset commands for inspecting Mac power settings, capabilities, battery state, schedules, and sleep history.
pmset referenceUse pmset -g log to inspect Mac sleep and wake history, separate clues from causes, and capture useful evidence for follow-up.
pmset referenceUse pmset -g assertions to inspect active Mac sleep assertions, understand their limits, and investigate a sleep problem safely.
pmset referenceLearn what pmset -g sched shows, how one-time and repeating power events differ, and why hardware support matters before changing schedules.
pmset referenceLearn what hibernatemode reports, why the right setting depends on Mac hardware and related power features, and how to inspect it safely.
pmset referenceLearn what pmset sleepnow does, how to use it as a controlled sleep test, and what to check if the Mac wakes or does not sleep.
Logs, current assertions and scheduled events answer different questions. An assertion describes a current request; a log describes recorded history. Neither automatically assigns battery usage to an app. Use the command reference to choose an inspection command before trying a configuration change.
Tell us what you’d like WattGuard to do, or share an unusual battery or sleep issue. We’ll help investigate your case, and what we learn could become a future WattGuard feature.
Include your Mac model, macOS version, what happens and what you’ve already tried.