pmset -g custom

macos_sequioa_hibernate.md

macOS Power Management Guide

Overview

This guide covers power management settings for macOS using the pmset utility, focusing on battery optimization and sleep behavior.

Basic Commands

Check Current Settings

# View all power management settings
pmset -g

# View detailed settings for different power modes
pmset -g custom

# Check specific hibernatemode setting
pmset -g | grep hibernatemode

Sleep Image

# Check sleep image file size
ls -lh /private/var/vm/sleepimage

Wake Analysis

# View system wake reasons
syslog |grep -i "Wake reason"

Hibernate Modes

• Mode 0: Traditional sleep mode
• Mode 3: Modern sleep mode (saves to disk)
• Mode 25: Aggressive hibernate (may lose state)

Set hibernate mode:

sudo pmset -a hibernatemode 0

Quick Restore to Defaults

sudo pmset -a restoredefaults

Recommended Power Settings

Battery Power Settings

sudo pmset -b sleepbutton 1
sudo pmset -b lowpowermode 0
sudo pmset -b standby 1
sudo pmset -b ttyskeepawake 0
sudo pmset -b hibernatemode 25
sudo pmset -b powernap 1
sudo pmset -b displaysleep 2
sudo pmset -b womp 0
sudo pmset -b networkoversleep 0
sudo pmset -b sleep 1
sudo pmset -b lessbright 1
sudo pmset -b tcpkeepalive 0
sudo pmset -b disksleep 5

AC Power Settings

sudo pmset -c sleepbutton 1
sudo pmset -c lowpowermode 0
sudo pmset -c standby 1
sudo pmset -c ttyskeepawake 1
sudo pmset -c hibernatemode 3
sudo pmset -c powernap 1
sudo pmset -c displaysleep 10
sudo pmset -c womp 1
sudo pmset -c networkoversleep 0
sudo pmset -c sleep 1
sudo pmset -c tcpkeepalive 1
sudo pmset -c disksleep 10

Quick Setup for Basic Power Saving

# Disable unnecessary wake features
sudo pmset -b ttyskeepawake 0
sudo pmset -b womp 0
sudo pmset -b powernap 0
sudo pmset -b hibernatemode 3

# Set aggressive auto power off (4 hours)
sudo pmset -b autopoweroffdelay 14400

Key Parameters Explained

• sleepbutton: Control power button sleep behavior
• ttyskeepawake: Terminal preventing sleep
• womp: Wake on network access
• powernap: Background maintenance during sleep
• hibernatemode: Sleep state management method
• displaysleep: Display sleep timer
• disksleep: Hard drive sleep timer
• networkoversleep: Network preventing sleep
• tcpkeepalive: Keep TCP connections alive

Notes

• Hibernatemode 25 is more aggressive but may risk state loss
• Settings can be applied to all power modes (-a), battery (-b), or AC (-c)
• Always verify changes with pmset -g custom

setup_hibernate.sh

#!/bin/bash

# Battery Power Settings (-b)
sudo pmset -b sleepbutton 1
sudo pmset -b lowpowermode 0
sudo pmset -b standby 1
sudo pmset -b ttyskeepawake 0
sudo pmset -b hibernatemode 25
sudo pmset -b powernap 1
sudo pmset -b displaysleep 2
sudo pmset -b womp 0
sudo pmset -b networkoversleep 0
sudo pmset -b sleep 1
sudo pmset -b lessbright 1
sudo pmset -b tcpkeepalive 0
sudo pmset -b disksleep 5

# AC Power Settings (-c)
sudo pmset -c sleepbutton 1
sudo pmset -c lowpowermode 0
sudo pmset -c standby 1
sudo pmset -c ttyskeepawake 1
sudo pmset -c hibernatemode 3
sudo pmset -c powernap 1
sudo pmset -c displaysleep 10
sudo pmset -c womp 1
sudo pmset -c networkoversleep 0
sudo pmset -c sleep 1
sudo pmset -c tcpkeepalive 1
sudo pmset -c disksleep 10

# View all power management settings
pmset -g custom