Questions tagged [power-management]
Questions about with tracking and reducing power-drain for computers or devices.
368
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Can't find some kernel logs that could be seen in previous macOS versions
I am looking for the kernel log messages that are output during the macOS hibernation process. As an example:
8/20/14 11:58:40 AM kernel wired_pages_encrypted 60968, wired_pages_clear 39229, ...
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Mac Virtual Machine can't sleep
I have been running a macOS Ventura virtual machine using both UTM and Parallels on a Ventura host and have been trying to put the VM to sleep so I can monitor what happens with the logs. However, it ...
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Where is that "Put the hard disk(s) to sleep when possible" checkbox in modern macOS Sonoma etc. edition of the System Settings?
I would like to turn off the "Put the hard disk(s) to sleep when possible" feature is System Settings. Some folk say that will solve the mysterious problem of Disk not ejected properly error ...
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Delays to Sleep and Wake notifications
Is it normal that there are Kernel Client Acks every so often while my Mac is asleep indicating that there are delays on several drivers? I found entries like this via the command: pmset -g log | grep ...
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macOS: Programmatically access the "Screen On Usage" data shown in Settings->Battery
How do I programmatically access the "Screen On Usage" data shown in Settings->Battery?
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Connect 2 power providing USB-C devices to MacBook Air M2
I have a "BenQ PD3420-Q9H" monitor, which is connected via USB-C to my MacBook Air M2 and delivers power to charge it. The monitor has a built-in hub, which is easy to use but not sufficient....
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Auto switch sound sink on power change
I like to switch various working positions at home. I want to make it change to the bluetooth speakers on power plugged in. And switch to internal speakers when unplugged. How to do it with some App ...
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Schedule on and skip login screen
I'm trying to schedule my Mac Mini to automatically turn off at the end of the day and then turn back on the next morning, login, and then run an AppleScript.
This was all working fine in Monterey ...
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Errors from PerfPowerTelemetry/PerfPowerServices
I see these recurring errors from PerfPowerTelemetry
No metadata for metric: InstantAmperage
No metadata for metric: AppleRawCurrentCapacity
No metadata for metric: CycleCount
No metadata for ...
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How to stop all processes that prevent sleep via Terminal?
In the Activity Manager, you can see which processes prevent the system from sleeping. I know that the WindowsServer is a false positive, but others are not.
Sometimes I attempt to put my MacBook to ...
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kernel_task shutting down network when CPU not overheating
[MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports), 2.3 GHz Quad-Core Intel Core i7, 16 GB RAM, running Monterey 12.6.4]
kernel_task consumes inordinate CPU periodically--around 100+% according to ...
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148
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Battery not charging on MacBook Pro (mid-2012)
Seems to be a common problem, but so far, I haven't found a solution.
I have a mid-2012 MacBook Pro 15" running OSMojave 10.14.6. The battery I'm currently using has seen days, but all sysinfo ...
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How do I prevent the WiFi from dropping when an external monitor DPMS-es?
Near as I can tell, when macOS puts the monitors to sleep due to inactivity, the WiFi drops.
Can it … not?
(Note: we're plugged in the entire time. I'm not sleeping the laptop, I'm not closing the lid,...
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Optimizing Mac mini power consumption with 24/7 uptime
We have a new outdoor cat, and my wife put an AirTag on her. I set up a bash script on my Mac Studio to read the Find My json every minute and append new info into a csv. So long as the Find My app is ...
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Dock utility that shows current energy usage
The Activity Monitor.app has its own section all for energy consumption. This is really great for finding the aggregate worst offenders. The cpu section is great for finding the worst offender at any ...
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How can I fix a MacBook that won't start due to a faulty battery? Can I run it without one? [duplicate]
I have a MacBook pro 2016. Over the past few months, the battery performance started deteriorating rapidly. It wouldn't change all the way up to 100% anymore, and over time the maximum charge level ...
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Computer sleeping immediately after screen despite being set to sleep later
My current pmset -g is the following:
System-wide power settings:
Currently in use:
lidwake 1
autopoweroff 1
standbydelayhigh 86400
autopoweroffdelay 259200
...
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39
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Sudden change: closing lid turns off external monitors
I have a MacBook Pro M1 with two external monitors, one on the HDMI and one on a Thunderbolt port. This setup has worked well for quite a long time now.
Prior to this morning, I would plug in the ...
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Can a MacBook safely handle chargers that fluctuate maximum power?
I have a MacBook Pro M1 16”. Can it safely charge when the charger (with multiple USB-C ports) will fluctuate between 45 watts and 100 watts, based on number of cables plugged into it?
Can the ...
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Where is the setting for power saver > turn computer off at certain time? [duplicate]
Where is the setting for power saver > turn the computer off at a certain time?
I can only see the following in Settings > Energy Saver:
put hard disks to sleep when possible
wake for network ...
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480
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How to Reset the PMU on a PowerBook G4 15" A1095 5, 4 laptop?
I have been refurbishing 3 PowerBook G4 15" A1095s and 1 PowerBook G4 15" A1106 and need help with battery issues. All of them have been able to charge a battery. I have attempted to and ...
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Big Sur - Detecting when the screen has turned off
Is there a way under MacOS Big Sur (11.7.3) to detect when power-saver mode has kicked in and the screen has turned off?
I want to have a special utility run every time the screen turns off.
Is this ...
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78
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how do I make macOS never make a MacBook inactive?
I would like to make sure that my macOS MacBook is always running, even when the MacBook cover is closed (though connected to the power). There is a program running on the MacBook that needs to be ...
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No Audio Output Source detected - Wired Headphones & internal speakers affected
Intel based MacBook Air (2017) is showing no audio sources in the output tab neither for the internal speakers nor for the connected headphone jack but audio over bluetooth seams to work fine.
Here's ...
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317
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Cannot disable sleep on lid closing
New Mac user here. Got hold of two 2012 MacBook Pro notebooks. One of them has no battery and the other one has a slightly degraded battery. So here we're talking about the latter.
On this one with ...
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MacBook Air M1 battery completely drained after not using it for a few months
I powered off my M1 MacBook Air a few (~3) months ago and I was surprised to find out that it had drained completely when I tried to power it on today. Why did this happen?
If I recall correctly the ...
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How can I monitor the energy impact of peripheral devices connected to my Macbook?
How can I monitor the energy impact of peripheral devices connected to my Macbook? I want to see if my external HDD is draining my battery or not.
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515
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How can I set the low power mode to "Only On Battery" programmatically?
How can I set the low power mode to "Only On Battery" programmatically?
Using sudo pmset -a lowpowermode 0 sets it to "Always."
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Macbook M1 connected to display randomly shuts down while sleeping
A Macbook M1 connected to external display randomly shuts down while sleeping. The problem occurs regardless of the type of display connection (HDMI or USB-C). What can be the cause of this problem? I ...
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What happened to "Restore Defaults" for Power settings in Ventura?
I just upgraded to Ventura and trying to get used to some of the changes. I see that the Energy Saver settings are no longer under the Battery section of System Settings and instead are now part of ...
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482
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How do I prevent MacOS 11.2.3 (20D91) from logging out after some minutes inactivity?
I am running a task on an old iMac. MacOS version is 11.2.3 (20D91).
The task is about downloading 8000+ photos from an old iPhone with Image Capture. The task goes on very smoothly if the macOS doesn'...
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Is it programmable to make macOS ignore the power adapter and use only the battery? [duplicate]
There is a similar question here, but what I want is make macOS ignore the power adapter totally not just stop charging (which means the operations on mac will drain the battery).
Aldente has a ...
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144
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Standby versus autopoweroff
From the pmset manpage:
STANDBY ARGUMENTS
standby causes kernel power management to automatically hibernate a machine after it
has slept for a specified time period. This saves power while asleep. ...
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What is the best way to protect battery of an always-powered iPad?
If an iPad is always powered, the best way to protect the battery is not to use it at all, i.e. the system charge the battery to 60% then only use the external power supply and only use the internal ...
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Mac book air 2020 quad core: TERRIBLE performances, battery 1% no charge, fan very fast and loud, no warm
In our storage we have 6 MacBook Air 2020 with intel quad core CPU with Catalina.
ALL of them have the same issue:
No typical sound as the MacBook power up
Battery remain at 1% no charging (...
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MacBook Pro won't start up on Mondays
EDIT: Solved it... resetting the NVRAM did the trick.
I have a 2018 MacBook Pro running macOS Catalina. It's set in the energy settings to shut down in the evenings, and boot/wake on weekday mornings....
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Macbook Pro M1 shows cross in battery icon
Since yesterday, my mac is showing a cross in battery icon in menu bar.
I'm unable to boot it up after shutting down without plugging in the charger. On removing charger, battery in system ...
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Will iPhone modem and cellular radio turn off if WiFi connected
Imagine an iPhone on a high speed train: the radio will burn extra power to find good signal, while transiting through poor service areas.
If I connect the iPhone to the train’s WiFi, does the iPhone ...
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350
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macOS Monterey: set power button default long-press action, possible? [duplicate]
When long-pressing the power button, instead of showing the thing below, can I specify it to sleep immediately?
I have searched the web, but the only thing I could find was this question for Lion, and ...
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macOS Monterey: Enable idle screen off, but disable idle sleep, when on battery
On Windows, the idle screen turn off timer and idle sleep timer are two independent settings. On macOS Monteray, it seems there are no separate settings, but just one, and on battery, it seems the ...
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How to make MacBook battery last as long as possible while watching videos?
I want to do nothing on my MacBook except watch pre-downloaded MP4 videos.
How can I make the battery last as long as possible in this situation?
I will of course already:
screen minimum brightness
...
- 8,602
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49
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Excess power use alert?
I often hear the fan on my redacted's MacBook Air running continuously, indicating high power usage. Unfortunately, they're hard of hearing, and only likely to hear that when wearing hearing aids. Is ...
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MBP Pro M1 with macOS Monterey 12.5 waking itself from sleep (hourly)
I notice the MBP keeps waking itself from sleep during the night (hourly), even though I turned off power nap, TCPalive, etc.
Has anyone figured out why?
I like my devices to actually sleep when I put ...
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What's the unit of "12 hr power" in the energy section of activity monitor?
In the "energy" section of activity monitor, there is a heading "12 hr power".
Is there a the unit of this quantity so that I can convert it to watts?
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How do you interpret "12 hrs power" in Activity Monitor?
When hovering over the 12 hrs power column header in the Energy tab of Activity Monitor, it says:
Average Energy Impact over the last 12 hours or since the Mac started. Lower is better.
In my case, ...
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How to fix Lenovo L22e displays connected to an M1 Mac Mini when they sleep and do not wake?
M1 Mac mini (M1, 2020), with 2 Lenovo L22e-20 monitors.
I left the Mac unattended for 10 minutes, when I came back, 1 monitor is still on but the other has gone to sleep.
The one that stays on is ...
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Control strip stop works after about 24h of working + sleep, required SMC reset
Control strip stop works after about 24h of working + sleep, required SMC reset
Problem appears then i dropped about 0.06 L Coca Cola on Upper-Left side of my MacBook Pro (16-inch, 2019). First 2-3 ...
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HDMI display will sometimes not wake on but SSH works
Ever since upgrading my Macmini8,1 to OS v12 or 12.3, the display will sometimes not wake the next morning when I try to use it. When in this state, nothing I try gets me a working display and I am ...
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Why won't iPhone charge?
I have an iPhone 13 Pro, it is running iOS 15.4. It will only charge when it's dead, and even then it charges really slowly. It only will charge to 1% and then stops charging. I have tried restarting ...
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How to disable fast charging on 2021 Macbook Pros?
Is there a way to disable fast charging on 2021 Macbook Pros?
These are my reasons for doing so:
lower speed charging produces less heat and is therefore less stressful for batteries
I would always ...
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