Power Log

Know When Your Mac Starts and Stops

Track boot, shutdown, restart, sleep and wake events with microsecond precision. See uptime duration, identify restarts, and export records in multiple formats.

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macOS 12.0+

Powerful Features

Everything you need to understand your Mac's power events

Complete History

Access 2-4 weeks of boot, shutdown, restart, sleep and wake events from multiple system sources.

Microsecond Precision

Extract precise timestamps from system.log with UNIX timestamp accuracy, not just minute-level.

Uptime Duration

Automatically calculate how long your Mac ran between each boot/wake and shutdown/sleep cycle.

Smart Restart Detection

Automatically identify restarts by detecting shutdown→boot sequences within 3 minutes.

Sleep & Wake Details

Track sleep/wake reasons: lid open, power button, idle timeout, USB device, and DarkWake heartbeats.

Export Records

Export your power history in JSON, CSV, or TXT format for analysis or record keeping.

Use Cases

Real scenarios where Power Log makes a difference

Parental Monitoring

Popular

Know exactly when your kids use the computer. Review boot times, shutdown times, and total usage duration to ensure healthy screen time habits.

Work Hour Tracking

Accurately track daily computer usage for freelance billing, productivity analysis, or compliance reporting.

Troubleshoot Issues

Investigate unexpected shutdowns, battery drain during sleep, or identify what's causing frequent wake events.

Battery Optimization

Discover which DarkWake events drain your battery and understand why your Mac wakes up at night.

See It In Action

Clean, intuitive interface designed for macOS

Power Events
Updated at 20:31:22
2025-12-29 Monday
Boot
System startup
09:09:17
2025-12-28 Sunday
Shutdown
User shutdown
18:01:12
Restart8h 43m 17s
System restart
09:17:40
09:17:54
Boot1m 57s
System startup
09:15:57
2025-12-26 Friday
Shutdown
User shutdown
17:28:22
Boot8h 9m 39s
System startup
09:18:43

Download Power Log

Free, lightweight, and ready to use

Download for macOS

Version 1.0.0 · Universal Binary

Requirements

  • macOS 12.0 (Monterey) or later
  • Apple Silicon or Intel Mac
  • About 2MB disk space

Installation

  • 1
    Open DMG

    Double-click the downloaded file and drag Power Log to Applications.

  • 2
    First Launch

    macOS will warn that Apple cannot verify the developer - this is normal for non-App Store apps.

  • 3
    Allow in Settings

    Go to System Settings → Privacy & Security, click "Open Anyway" next to the blocked message.

Power Log needs to read system logs (/var/log/) and run system commands, which require distribution outside the App Store.

Frequently Asked Questions

Power Log retrieves 2-4 weeks of history by combining data from multiple sources: the 'last' command, system.log files, and pmset logs. The exact range depends on your Mac's log rotation settings.