Questions tagged [power]
The electricity drained by a device
712
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iMac turned on after repairing, but didn’t start again after that
My iMac (late 2014, 27 inch) stopped working so, I opened it up and figured out that the problem was in the power supply. I replaced the power supply and started it again, 3 LEDs were on (first 3 from ...
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Battery of 2018 MacBook Pro won't charge [duplicate]
Specifically, the battery won't charge when connected via power adapter. If I go to the battery menu in the menu bar, I no longer see an option "Charge to full now" like I used to before. I ...
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How do I automatically allow studio display connect to Macbook Pro?
Studio display disconnects many times on its own from macbook pro and I'm tired of clicking on "allow" connection to macbook pro.
Does anyone know how can I automatically allow studio ...
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MacBook A1398 has been turned off for years and will not turn on
I’ve got a MacBook A1398 that has been laying around on a shelve for a minimum of 7 years which I’d like to try to revive. I’ve hooked up the MagSafe charger for around 12 hours and keeps showing the ...
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Is the Apple 60W MagSafe Power Adapter better than 2012 in that way that the yellow color situation does not happen anymore?
Introduction
For an old MacBook Pro bought in 2012 as:
MBP 13.3/2.9/2X4GB/750/SD
Model No: A1278
The cable of the MagSafe since years ago changed the color to "yellow" and many parts of ...
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How can I find out which USB device (if any) is being disabled for using too much power?
As I use my Macbook, which is connected to a large number of USB hubs and devices, every few minutes I get a notification saying "USB Accessories Disabled; Unplug the accessory using too much ...
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2019 MacBook Pro not charging after battery replacement (charged once)
I have a 13” 2019 MacBook Pro. The battery needed to be replaced so I ordered a non-OEM battery and swapped myself. Everything went smooth, no issues whatsoever. I reattached the bottom case and ...
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Does a powered USB device draw power from the MacBook battery or power outlet when the MacBook is plugged in?
I have a few USB devices that are powered by USB. When my MacBook is on battery I assume the draw from USB device is from the only power source, the battery of the MacBook. When the MacBook is plugged ...
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Considering that my Mac is usually on clamshell-mode, should I let it sleep always or should I shut it down?
Almost always, I use my Macbook Air (M1) connected to an external display and closed. This means under the "clamshell mode".
On most occasions, I simply stop using the computer. After 5 ...
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Charging requirements for 2023 16" MacBook Pro (M2 Pro)
I have a 2023 16" MacBook Pro (M2 Pro). I'm trying to determine some levels of minimum charging requirements.
It's well advertised that to Fast Charge, you need the 140W charger and to use the ...
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How do I keep my screens ON when locking MacOS Ventura?
I have a problem when I lock my MacOS Ventura MBP. My external monitors take an eternity to wake up after being asleep. I want to log back in and return to work immediately. The built-in display wakes ...
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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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MacBook Pro (13-inch non-retina mid2012) won't turn on after connecting a Raspberry Pi to it using a USB cable
I was working with my Raspberry Pi Pico, connecting it to my MacBook Pro (13-inch non-retina display mid 2012, running macOS Catalina) using a USB cable (with the other end being a micro USB). ...
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Why does the MagSafe Connector Charging Indicator flicker? [duplicate]
The MagSafe Connector charging indicator light flickers when connected to my MacBook Pro (Retina, 15-inch, Mid 2015). The MagSafe cable comes from a Thunderbolt Display (2015) and has a L-style ...
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Is my macbook usb-c charger cable supposed to handle video transmission when connected to a Dell Monitor?
I have a Macbook Air M1 running MacOS 13.3.1 and I tried a DELL monitor on the other day.
This is the DELL monitor spec:
Screen Size: 31.5 in (80.01cm)
Resolution: 1440p WQHD
Native Resolution: QHD (...
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How hot should a Mac power adapter get?
I've borrowed a 2015 MacBook Retina to process Go Pro 360 videos because there's no Linux software to do this.
The power supply gets excessively hot and I feel this is not normal. When the laptop is ...
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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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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 ...
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Blackscreen on 27” iMac 2017
I own a iMac 27” retina 2017.
It won’t turn on again. The screen is black and stays black when turn the iMac on and off.
I even hear nothing when I turn the Mac on. No click sound, no chime, nothing.
...
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1
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Swapping the plug in an Airport Express into a 2021 Power Adapter block?
Kind of a strange question, but I've got an Airport Express that ended up no longer being used. My partner has a modern (2021) Macbook Pro and it's power adapter plug is slightly damaged.
It looks ...
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Connecting power-hungry external devices to my iPad air 4th Gen 2020 via USB-C hub
I intend on connecting power hungry external devices to my iPad via a USB-C hub. I have seen many different names for powered hubs on the market and I cant get a straight answer as for the difference ...
Oliver
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Slow and preservative charging options for day to day use, iPhone 14 Pro
I want to preserve my phone to the best extent I can, so I need advice on what charger I should be using day to day.
The phone does not come with a charger and the official page encourages us to reuse ...
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Query whether MacBook is plugged or on battery from shell script
I am writing a shell script that I will leave running in background for some syncing tasks. I would like this script to behave differently depending on whether my MacBook is plugged to a power source, ...
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1
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MacBook Air M1 and 100W USB-C Output Solar Battery
I have a MacBook Air M1 and two different solar batteries* that have 100W USB-C outputs. Can plug the USB-C cable that came with my computer from the USB-C output port on the battery directly into the ...
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Is there a way to detect power state change from the command line?
I would like to disable some power hungry services once I disconnect the power cord. Was thinking of creating a launchd agent that can monitor a file and run a script.
If there are other ways of ...
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545
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Waking up a MacBook Pro M2 from sleep in clamshell mode without AC power
I got my MacBook M2 to work in closed-clamshell mode without AC power using the pmset commands. However, if I intentionally put the MacBook to sleep (using hot corners), I cannot seem to wake it up ...
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How to enable custom "low power mode" on a mac?
The low power mode on MacBook settings apparently might decrease refresh rate of the display and power consumption of the processor.
Is there an app providing the option to do this in a customisable ...
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How does "caffeinate" affect the remaining power adapter display turn-off delay?
I'm running Big Sur 11.7.3.
I know that the caffeinate utility can prevent the system from going into power-saver mode. But what I want to know is whether after caffeinate runs, will the power-saver ...
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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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MacBook Pro Retina Mid 2014 shuts down randomly [duplicate]
For a while now, my Mid-2014 MacBook Pro Retina has been shutting down/sleeping randomly (without notifying me) while on battery power. After it shuts down, if I try to turn it on it asks me to plug ...
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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 without battery thinks it has no trackpad (when it has)
New mac user here. Just got hold of two well kept MacBook pro 2012 running MacOS Catalina. One of them has no battery and runs directly on AC power (plugged in). The other one has batteries that need ...
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Battery Status Bar broken -> Says 100%, mac does not fully charge
Charging Behavior
From 1% battery on, this Mac claims to need six hours to fully charge. At some point the status bar breaks and shows 100% within 20 minutes of charging. As far as I am aware, Mac ...
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Macbook Air 13" Mid 2011 battery drain issue
I own a Mid 2011 Macbook Air 13". It is running macOS Mojave 10.14.6.
I replaced the battery once with a battery purchased from Amazon.
coconutBattery is reporting, as of right now, as having:
...
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Can I charge my iPhone with a standard USB charger?
I need to charge my Apple iPhone, and I don't have an original Apple charger. I have a cable with one end being a male Apple iPhone connector (which fits OK the female socket on my iPhone) and the ...
Alexander Gelbukh
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3
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How can I stop Macbook Pro from decreasing screen brightness, everytime I remove the MagSafe charger?
How can I stop the screen dimming on macOS Ventura, everytime I unplug the MagSafe Charger on my 2021 MacBook Pro?
Is there any way to disable this weird energy saving feature. I want my screen to ...
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Does any iPhone take advantage of higher current limits for USB Battery Charging ports?
A USB Battery Charging port can deliver 1.5 A of current at 5 V. My iPhone 8 for instance came with a 1 A charger, so I can't assume that it'll use more than that from a USB A socket (it can however ...
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MacBook Air 2015 - power button hasn't been working? [duplicate]
So I have an early 2015 MacBook Air and haven't used it in months due to it not turning on (even though the charging light was on)
It's been months as I said so tonight I thought I'd try turning it on ...
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How to see battery consumption per application (!!) over the past X hours on my MacBook
I asked this question a while back: Stop MacBook from using up the battery while it is in sleep mode. And never got to the bottom of it.
I keeps happening, that I put my Mac in sleep (on a full ...
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Is there anything I can do to stop windows from moving to the primary monitor when the 2nd monitor takes a while to come on?
OS: Monterey 12.5.1
I have 2 monitors, one an LG and one an AOC. Different sizes. Sometimes when I come back from being away for lunch I find that some (but not all) apps have migrated from the ...
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Can the strength of the power supply affect the performance of the Macbook?
I have a maxed-out 16" MacBook Pro from 2021. I have a 140W USB-C Power Adapter from Apple that I can use with it. I also have a Belkin Thunderbolt 3 Dock that can supply 85W.
I usually use the ...
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Does using a lower power adapter to prevent fast charging (MBP M1) help preserve the battery?
I've gone through old well-answered questions about how to prevent a Mac battery lifespan (Does a low power charger help Macbook's battery, Limiting macbook (usb c) charge level…, Apple ...
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Is it possible to use an apple 96W USB-C power adapter on an old MacBook Pro Retina 15" from mid 2014?
In order to reduce the amount of power adapters, I would like to use an apple 96W USB-C power adapter on an old MacBook Pro Retina 15" from mid 2014, with an adapter cable USB-C to MagSafe.
Is ...
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How to make the MacBook Pro sleep when the lid is closed [duplicate]
My MacBook Pro does not go to sleep when the lid is closed; I have to unplug the adaptor to make it sleep. When I plugin the power adaptor, it wakes up and keeps running even if the lid is closed.
...
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How can I find the minimum wattage requirement to charge a MacBook?
I was in an electronics store and needed to know if any of their powerbanks would charge my 2019 MacBook Pro. The powerbanks outputted 20 watts, and I know if a MacBook is provided with too low ...
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Magsafe 1 charger head makes strange noise when charging MacBook Pro
I've seen this problem happened several times already to people on the Internet, but I still prefer to ask to be sure there is no danger because I really feel worried
I have a MacBook Pro Unibody Mid ...
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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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Can I use a USB-C to Magsafe adapter to charge my MacBook Pro Unibody Mid 2012 15'' ? (85 W)
I saw this question USB-C to MagSafe 2 Adapter but I'm not sure if it applies to my case that's why I ask
I found a converter from USB-C to Magsafe, but I read somewhere that there may be a power ...
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3
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Can you safely use any higher-wattage MagSafe1 charger on any MacBook?
There is already a thread asking whether MagSafe1 chargers can be used interchangeably. However, having gone through all answers, and asked in the comments, I found that not a single person reported ...
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M1 / M2 Pro vs Max heat and energy consumption
I know this is going to sound ridiculous, but I'm primarily looking at the 16 inch MBP for the larger screen real estate. Granted, I always want my chips to be fastest, etc. but I have a mini-...
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