Questions tagged [power]

The electricity drained by a device

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Mac Pro A1186 does not turn on, makes clicking sound

Our Mac Pro A1186 which was turned off for a while during Covid, now does not turn on anymore. When pressing the power button, it makes a clicking sound, then 3 seconds later another one, and simply ...
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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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M1 MacBook Pro charging indicator stays orange even while 100% charged

My MagSafe charger shows an orange light on my 16-inch M1 MacBook Pro (Late 2021) from time to time for hours/days when the lid is closed (monitor, webcam, microphone connected externally via USB-C). ...
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How to completely deactivate the TouchID button on 2018 Intel MacBook Pro

I recently had an issue involving liquid poured over the top right corner of my keyboard, thus going under the TouchID button. Since then, at random times, my MacBook auto-locks itself and then shuts ...
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Macbook pro 2015 won’t turn on unless I disconnect and reconnect the battery

My problem is similar to this thread: MacBook Air won't power on, except I remove the battery and plug it back in (SMC reset?) - sleep works The Mac won’t turn on unless I unplug and replug the ...
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iPhone XS automatically shuts down once plugged to charger

Recently I replaced my iPhone X's battery, and it was working fine for at least one week. Here is weird problem: when I plugged it to charger it start charging like normal, once screen goes dim & ...
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Using a power bank for MacBook Pro 2015

My venerable MacBook Pro 2015/retina still has plenty of life in it but it is of course not up to date with a variety of things. For instance, I understand that its Thunderbolt 2 ports cannot be used ...
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Unopened app taking 95%+ of battery power

I have a 2015 MBP on MacOS 11.6 and it recently has been running out of power quickly. When I click the battery icon on the top bar, it shows Atom is drawing significant power. This is weird because ...
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How to allow screen sleep (but keep WiFi up, under Power Adapter)?

Monterey 12.3.1 on a 2020 M1 MBA Issue I run a streaming client in a Terminal under VS Code. It's ok if the screens go off through the timer when I step away, but I want WiFi and the computer to ...
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How does powermetrics work?

Apple seems to have upgraded the output of powermetrics on M1 CPUs to include reports of consumed power. Output looks roughly like this: sudo powermetrics | grep -i power .... E-Cluster Power: ...
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How do I avoid the "USB Accessories Disabled" notification when charging devices from thunderbolt dock & monitor?

I've got a brand-new TS4 thunderbolt dock with tons of high-voltage ports, happily charging my M1 Max macbook at 98W. It charges super fast over the single cable, as well as driving the display and ...
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Monitor charging in detail

I have the suspicion that my power supply regularly interrupts power for a second or so – one observation is that when working with my closed MBP (2015) with an external monitor, the monitor every now ...
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174 views

How to turn off Thunderbolt charging on Mac Book Pro so that only the main MagSafe charger is used?

I use a Mac Book Pro (MBP18,2) in a primarily office setting and have it plugged in essentially all of the time. This is, of course, detrimental to the battery. I'd like to allow it to drain and use ...
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How can I disable the USB power supply from Mac when it goes to sleep mode (including when it's installing updates at night)?

I have a USB mouse that has some rainbow-like LED colors (gaming mouse). I keep it connected to my Mac via USB. At night I just leave the Mac as it is (in sleep mode). The monitor switches off which ...
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What to replace, power button or logic board?

Working on a MacBook Air 11" Mid 2013 with an i5 Processor. I found that shutting the unit down and then pressing the power button would not return the unit to a powered state. Removing the ...
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1 answer
132 views

Get Historic System Event Logs (Sleep, Restart, Wake-up etc)

How can I get the power-related events (Sleep, restart, wake-up) for the current system, like e.g. 2022-02-27T08:02:01 System Restarted 2022-02-28T08:34:32 Resumed from sleep 2022-02-28T15:15:11 Sleep ...
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AC Charger cannot charge MacBook Pro, but another MacBook can

My girlfriend woke up to realize that her charger cannot charge her MacBook Pro (2017 model running macOS 10.14.6), so she borrowed mine (2017 model running macOS 12.2.1), but that didn't work either. ...
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Can I use a Mac Mini with a HDMI switch?

I’ve been trying to use a HDMI switch to use both my work computer and personal computer (Mac Mini 2011) on the same screen. However when I have both laptops and the switch plugged into the screen, I ...
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What can I safely charge with the apple 20W power plug?

I once plugged a macbook air usb-c charger on a wireless speaker and it completely screwed the battery, so apparently, I can't charge any battery with any charger. I just got a 20W apple charger for ...
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Charging MacBook with Phone charger and vice versa

I have a 2020 MacBook air M1 that comes with a 30w charger, and a Poco M3 that comes with a 25w charger. each charger has the maximum output power on the respected device, but when I switch the ...
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584 views

Does the 140W USB-C Power Adapter work on MacBook Pro (16-inch, 2019)?

I read this other question for a problem that i have(MacBook Pro not charging under heavy load) Since I do React native development, it seems to be chugging hard on my battery, and since it appears to ...
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402 views

Apple Thunderbolt Display Magsafe 1 to USB-C charge Macbook Air M1

I have an MacBook Air M1 and Apple Thunderbolt Display: DisplayPort connected to Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter (https://support.apple.com/en-gb/HT207266): Currently connected ...
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Could my MBP be breaking power bricks?

I have a 2019 MBP Touch Bar. A month ago, my stock 87W brick stopped working. (Not a cable issue, etc., definitely the brick.) Bought a replacement 96W brick off Amazon — not Apple, but with good ...
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207 views

Does Apple ever update the firmware on their USB C AC power adapters?

I have a MacBook Air (Intel, 2020) that came with the 30W official Apple OEM power adapter. If I use the power adapter with my MacBook Air and check “System Report > Hardware > Power” and scroll ...
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Apple Charging MagSafe 2 cable not working?

My MacBook charger won't magnetise properly anymore. I took a look at the ports and one of the little gold things are burnt, and the same one on my MacBook. I tested my old charging cable that broke ...
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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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-4 votes
1 answer
68 views

Can I run my laptop directly from an external battery at full throttle while charging my iPhone from the laptop at the same time?

I would like the freedom to power my laptop from an external battery to avoid very frequent cycling between 100% and 90% (say 2 or 3 times a day) due to my unique work/travel habits. I've never bought ...
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2 votes
1 answer
45 views

Force charging MacBook from a specific USB-C port?

here is my situation: my screen is plugged into a USB-C port, and can charge my 15-inch 2017 MacBook Pro, but can't actually supply enough power during periods of intense usage. my USB-C power ...
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2k views

New battery: "The battery's capacity is significantly reduced."

I changed the battery in my old Macbook Air 11" (mid 2013). It all appears to work fine after installation. To recalibrate the power system, I followed the steps outlined by, e.g., ifixit: With ...
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236 views

USB-C to USB-A cable that supports/powers a laptop cooler fans

My son has been using a laptop cooler under his Intel 16” MacBook Pro and the cooler came with a USB-A cable so I had to use a USB-C to USB-A adapter which works fine but I wanted to not have to use ...
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Based on my atypical (low) iPhone usage pattern, might the iPhone 13 Pro Max's larger battery last noticeably longer than the 13 Pro's?

I've nursed my iPhone 6 through thick and thin and will now buy either iPhone 13 Pro or Pro/Max. I am not a heavy phone user; for anything video or heavy browsing I prefer to pull out my laptop. On a ...
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0 votes
1 answer
108 views

Whether this wireless charging speed for iPhone is 7.5W or not?

iPhone SE 2, iOS 15.2, MagSafe wireless charger From 11% to 31%: 1.21% per minute. From 43% to 64%: 1.03% per minute. From 63% to 68%: 0.87% per minute. Do you think the speed is 7.5W or at least ...
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Macbook Optimised battery charging not working with third party Charger

Since I've been using a new third party charger (65W) to charge my MBP, it always charges past 80% and it always is at 100%. Why doesn't optimised battery charging work with the third party power ...
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0 answers
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What does it mean if my iPhone 12 isn't powering on?

Today I received a brand new iPhone 12 mini. It won't power on, no matter what I try. I tried charging it for a couple of hours, but when I hit the power button it still shows that it's dead or needs ...
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0 answers
145 views

Can I charge my iPhone from my laptop's USB-C port while my laptop is charging?

I have an M1 Pro MacBook Pro. Is it safe to charge my phone via one of the machine's USB-C ports while the laptop itself is being charged from a different USB-C port (i.e., not the MagSafe 3 port)? I ...
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1 answer
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Does lower power affect a MacBook Pro negatively?

I've got a new MacBook Pro 16" 2021 with a Pro M1 processor. It is specced to use a 140W MagSafe power adapter. I already have a USB-C dock (a Belkin Thunderpolt 3) through which I have connected ...
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0 votes
1 answer
119 views

Macbook pro 13'' (early 2011) battery not charging/suddenly shutting down

I have a Macbook Pro 13" early 2011 which stopped charging a couple of months ago. I'll describe its current issues: 1) Not charging battery 2) If turned on it can either not start (right white ...
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AirPods Max not charging from a 5W charger

I have a 5W charger that I bought from Apple, it works fine with my phone. Now I got AirPods Max, they were delivered with an empty battery, so I started charging them. The headphones immediately woke ...
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1 answer
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Is battery consumption reduced if I close my laptop lid while it is connected to an external monitor? [closed]

I've noticed that when I close my laptop screen while it is connected to an external monitor, battery lasts quite longer before I need to plug in my Lenovo laptop. Is it just me or does closing the ...
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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 ...
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1 vote
1 answer
158 views

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 ...
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-2 votes
1 answer
133 views

How much longer does the M1-Max MacBook Pro battery last compared to the previous (non-M1-Max) model? [closed]

How much longer the battery life of the most recent 16 inch MacBook Pro is relative to the next most recent 16 inch MacBook Pro (2019 model) under similar (preferably identical) work loads? What I ...
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0 answers
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Monterey - Is there a macOS preference to automatically revert back the brightness level when the MacBook is plugged in?

As the title is self-descriptive, I'm looking for a macOS preference to automatically revert back the brightness level when the MacBook is plugged in as the preference "Slightly dim the display ...
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1 answer
76 views

Apple battery issue or something else?

I have a MacBook Air 2015 (13-inch). Bought it in oct 2016 and has been used decently since (5 years). Obviously, I have started having issues with shorter battery life (coconut battery says 30% - 40% ...
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1 answer
175 views

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 ...
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2 votes
0 answers
69 views

Cannot Exclude Swap Directory from Spotlight: The item couldn't be added or removed because of an unknown error

Since my Macbook Pro (Big Sur 11.6) is burning through its battery power really quickly with mds_store clocking the most CPU usage, running the following command sudo fs_usage -w -f filesys mds_stores ...
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4 votes
3 answers
3k views

How to resolve my mac dying at 75% battery?

Tl;dr My 2015 Macbook Pro Retina shuts off without any warning when the battery discharges to 75%. According to Coconut Battery Design Capacity: 56.7% Made in 4/13/15 Has lasted 3,268 cycles, and the ...
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1 vote
1 answer
193 views

Used 20v Adapter on 14.85v Mac Air: Now It Will Not Turn On! What circuit needs to be replaced for an overvoltage burnout?

My wife ordered a new adapter for her 2013 Mac Air Model A1466, Amazon sent the wrong one and we did not notice because the mag fit perfectly and it appeared to charge. This seemed to charge fine for ...
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1 vote
1 answer
37 views

Does MacOS 11.5.2 log mains failures?

If a MacBook Pro (16-inch, 2019) has its charger plugged in and the mains power goes off and back on, is that recorded in any log? Maybe something monitoring that USB port? (Nothing in console has &...
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1 vote
2 answers
351 views

Does using a lower wattage power adapter for a MacBook increase its battery health?

I have a 16" MBP which comes with a 96W power adapter. With iPhones, I always heard that the faster you charge the battery (i.e., more power you use), the faster the battery degrades. So, instead ...
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