Questions tagged [power-management]
Questions about with tracking and reducing power-drain for computers or devices.
354
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2
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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 ...
- 121
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0
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13
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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
...
- 258
0
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0
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13
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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 ...
- 281
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2
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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 ...
- 181
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52
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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 ...
- 235
1
vote
1
answer
136
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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 ...
- 11
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votes
1
answer
29
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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 ...
- 308
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0
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45
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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 ...
- 211
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0
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15
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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 ...
1
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2
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129
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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 ...
- 141
3
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1
answer
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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 ...
- 33
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1
answer
34
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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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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 ...
- 141
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1
answer
994
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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 ...
- 43
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1
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207
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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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1
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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 ...
- 71
0
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0
answers
85
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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. ...
- 592
1
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1
answer
1k
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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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4
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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 (...
- 121
4
votes
1
answer
142
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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....
- 2,683
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2
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606
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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 ...
- 113
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0
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12
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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 ...
- 2,733
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1
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218
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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 ...
- 1,889
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0
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180
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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 ...
- 1,889
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3
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2k
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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
...
- 8,160
0
votes
1
answer
48
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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 ...
- 101
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520
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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 ...
- 111
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0
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37
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MacBookPro5,5 with EFI/SMC problems
A long time ago, I tested a patch to be able to use Catalina. It did not work, but my Mac went on working. Then weeks later the battery could not load. It always shows a green LED but at 0%. I reset ...
2
votes
1
answer
965
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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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1
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2k
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M1 Mac Mini monitor has gone to sleep and I can't wake it up
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 ...
- 235
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0
answers
35
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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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2
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0
answers
80
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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 ...
- 121
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0
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30
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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 ...
6
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3
answers
2k
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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 ...
- 1,430
0
votes
0
answers
21
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Why would my wife's MacBook Pro start up as soon as I touch the keyboard?
My son just spilled milk on the keyboard of my wife's MacBook Pro. This is definitely a time to cry, because of the risk of liquid getting into the electronics of the computer. I immediately held ...
- 8,930
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0
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503
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Why is Home using so much battery life?
I don’t use Home to control my lights. I use the Hue app. Why is it using so much power in the background? I’m on iOS 15.1.1 on an iPhone 12 mini.
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563
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Why is my (genuine Apple) 10W/2.1A iPad AC charger providing only 5W when powering my new M1 MacBook? [closed]
I'm curious, and M1/ARM64/Apple Silicon MacBooks are incredibly efficient, so I am exploring using smaller power sources like my (genuine Apple) 10W/2.1A iPad AC charger. But I wonder: Why is it ...
1
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1
answer
717
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Can a display's Power Delivery be turned off?
my main machine is a 2016 15" MacBook Pro and, working in print graphics, I usually have it connected to an external display (as of today, a Huawei MateView 28.2in).
This display has 65W power ...
- 1,028
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0
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157
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high fan speed even w/o SSD on MacBookPro9,2 (mid-2012) MD101LL/A
It is important that I give a detailed description of the event
MacBook model MacBookPro9,2 (mid-2012), MD101LL/A, Core i5, 16G RAM, SSD 500GB, bought in 2014
Used up to a week before the disaster, ...
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1
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MacBook Air won't power on, unless battery disconnected and plugged in
This is for those who have had trouble with all the combined issues:
Macbook Air 2012-2017 ( possibly other models)
Won't turn on unless the battery is disconnected for a short time and then plugged ...
- 1
1
vote
1
answer
927
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Mac fan always running, even after SMC reset
Ive got a 2017 15" MBP with an i7 CPU running Big Sur.
The mac's fan has been running very loud for a few weeks now, i googled it and did an SMC reset, but this has not solved the issue. The fan ...
- 3,755
5
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1
answer
2k
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Reset SMC without Option and Control key
I need to reset SMC on my Macbook Pro 15 2018 to try fix power problems (macbook goes to sleep even though its disabled with sudo pmset -b disablesleep 1).
The problem is, I spilled some water on my ...
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2
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650
views
Is it a battery problem or SMC problem?
I have a mid-2015 MacBook Pro running High Sierra. Except when I'm traveling, I always use it in clamshell mode and connected to power. I rarely put it to sleep (I have Energy Saver set to just put ...
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2
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3k
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Macbook "press and hold power button for 10 seconds"?
In the official Apple support guide to reset the SMC of a Mac with the T2 chip, it says:
Before resetting the SMC, try these steps:
Shut down your Mac.
Press and hold the power button for 10 seconds,...
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votes
0
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606
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Big Sur (Intel) is waking from hibernate automatically, why and how to stop?
Quick Summary
pmset -g log | grep -i "wake from" gives the following for "Wake from Hibernate" (full result list bottom):
A) Wake from Hibernate [CDNVA] : due to EC.PowerButton/...
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1
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2k
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Why Notes app use a lot of resource/energy?
I use macOS Big Sur on my MacBook Pro early 2015.
Usually, I very rarely open the Notes app, I just using it for copy-paste only, maybe 4-10 times or 2-5 minutes in every 12 hours, but usually I ...
12
votes
2
answers
7k
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Sleep prevented by powerd
Recently, my M1 MBA was draining out of battery very quickly. I lose 50% charge in an hour, losing about 1% in less than a minute. This was surely not the case before. When I click on the battery bar ...
- 121
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votes
1
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573
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Macbook Pro 2018 - Battery drain since update while shut down
My Macbook Pro is starting to have power management issues. I tried alrady NVRAM / PRAM Reset and SMC Reset to no avail.
I regularly shut down my Macbook over the night. Since a few weeks, the battery ...
