Questions tagged [power-management]

Questions about with tracking and reducing power-drain for computers or devices.

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1answer
57 views

Can I completely turn off the fans on a MacBook Pro (0 RPM)

I would like to know if there is a utility to completely turn off the fans. Currently, when completely idle, fans are showing 2000 and 2100 RPM. Although this is probably not recommended, I would ...
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0answers
45 views

Macbook Air 2017 - does not turn on, battery charging and seems to work

I have a 2017 Macbook air that is giving me problems since last month. The laptop when it goes to sleep while not charging won't come back to life. At first, the SMC reset worked but now that doesn't ...
4
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1answer
92 views

My computer wakes up at 5:59:39 every morning. How do I stop that from happening?

For some reason my 2017 iMac running macOS 10.14.6 keeps waking up from sleep at exactly 5:59:39 AM every morning. If I look at the logs using pmset -g log at this time it consistently reports: 2019-...
2
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1answer
31 views

Notifications causing screen waking

I recently got a new MacBook Pro (2019 model). With this computer, if the displays are sleeping (I often have an external monitor attached via USB-C dock), they will wake up for a few seconds when a ...
1
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0answers
20 views

MacBook battery won't charge but powers on either battery or direct power source

My MacBook won't charge. When I plug the magsafe adapter it doesn't light up (no amber nor green). I tried using a friend's charger to check if the adapter is at fault but the result is the same. So I ...
0
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1answer
22 views

Cap energy consumption of processes on macOS

Most of us probably already had this situation: One is tight on battery and trying to save as much energy as possible. Then suddenly a process goes wild and drains the battery by 10 or more percent ...
4
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1answer
914 views

MacBook Pro randomly waking up from sleep after Catalina update

Since the upgrade to macOS Catalina 10.15.0, I've noticed that my MacBook Pro is randomly waking up from sleep. I use the MBP connected to an External display, BT mouse (MX Master), an external ...
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0answers
41 views

kernel: (AppleSMC) Previous shutdown cause: -6

I have a MacBook pro retina 13-inch, early 2015. A couple of months ago I got the "service battery notification", now my MacBook is turning off randomly, sometimes repeatedly in a short period of ...
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72 views

Macbook sudden black screen & Shutdown

My MacBook pro retina 15" Late 2013 8 gb RAM MacBookPro11,2 A1398 (EMC 2674 ) was shutting down by itself, and when I ran the command in terminal the log it says, kernel: (AppleSMC) Previous ...
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1answer
330 views

Brand new MacBook Pro says “Service Battery”

Unpacked a new MacBook Pro 13" yesterday. I've been using it for a couple of hours before plugging it in for the very first time as it told me that it still had plenty of battery power left. I was ...
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0answers
11 views

Brand New MacBook Pro 2019 13inch shuts down at 53% battery charge [duplicate]

So I just bought a new MacBook Pro today. As I was setting everything up and downloading the programs I use, the Mac suddenly shuts off at 53%. I kept trying to turn it back on with the power button ...
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0answers
44 views

Macbook 2015 with normal battery won't charge even after SMC

My MacBook won't charge. Here are the things I have done so far: I tested the MagSafe charger to another laptop to make sure it is not faulty ( MagSafe is working ) I did the SMC reset ( shift + alt +...
1
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1answer
93 views

Reset NVRAM, PRAM, and SMC, all in one go from the terminal?

I'd like to run some code, go away and have a coffee and come back to a MacBook with the NVRAM, PRAM and SMC all reset (rather than doing them manually with yoga postures to press all the keys, ...
4
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1answer
221 views

Macbook Pro 2018 battery not charging dodocool 7-in-1 hub suspected

I am having a version of the battery not charging issue on my Macbook Pro 2018 (13-inch, Four Thunderbolt 3 Ports). The symptoms are somewhat different from related issues, such as in this post. I am ...
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0answers
40 views

Frequently Have to Reset SMC to turn on MacBook

So over the last 2-3 weeks my 2014 13 inch MacBook Pro has developed an issue. I have to reset my SMC in order to power it on. This has occurred about 4-5 times. Additionally, my battery is on it's ...
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0answers
31 views

MBP shuts down at 40%~ battery, and recalibration didn't help [duplicate]

EDIT: I don't think this is a duplicate question. My MBP is only 2 years old and its battery cycle count is only 90. I have a MacBook Pro (13-inch, 2017, Four Thunderbolt 3 Ports) with macOS 10.12.6, ...
1
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1answer
31 views

Charging suddenly stop when I try to use the device

It's my first time with a mac computer, I have a macbook pro 2011 . The problem , charger works fine when the laptop is closed or idle, when I start using it like for example opening Finder, simply ...
1
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1answer
63 views

How to disable Energy Saver mode when switching to battery to stop background windows hiding?

So, Mojave appears to background all of your windows when you unplug. Then you re-plug and suddenly all your windows are out of order. The energy saver options don't seem to have anything related to ...
2
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2answers
54 views

MacBook Pro sleeps unexpectedly and runs fans at high speed, even after SMC reset

My MacBook Pro (15 in Retina, early 2013, macOS 10.14.5) sleeps unexpectedly, although there is enough charge in the battery. To wake it up, I must connect the power supply. Furthermore, the fans run ...
1
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0answers
79 views

Macbook Air Mid 2012 A1466 Power button not working

Thanks for stopping by. As the title states, when I press the power button on the keyboard, nothing happens. This is a ongoing problem I've had for a couple months now and it's starting to get on my ...
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0answers
18 views

MacBook Pro 2011 battery not detected

My MacBook Pro 2011 battery is not detected. There is no spill of water or whatsoever on my logic board. One day I took out the battery and when I placed it back the problem occurred. So I tried ...
0
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1answer
23 views

MacBook Pro goes into hibernation immediately after login, how do I fix this?

My Mid 2012 MacBook Pro, goes into hibernation immediately after logging in. Battery indicator still shows around 95% charges when it does that. When I plug in and reboot, battery shows 0%. This does ...
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0answers
36 views

Mac Wake From Hibernate (not sleep) - prevent asking for password?

I have an old 2011 iMac (OSX 10.12.6) in the kitchen which I want to use as a "kiosk". It can go to sleep and on touching the keyboard I want it to come back on without asking for a password. Works ...
2
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0answers
135 views

Automatically toggle iPhone Low Power Mode on set schedule

Is there a way built-in, using Shortcuts app or other to schedule toggling of Low Power Mode on an iPhone?
1
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1answer
154 views

MacBook Pro keep on “unplugging” battery and need SMC/PRAM reset

I recently brought my 2015 13" MacBook Pro to an Apple center to get a screen replacement for Staingate. They did it for free. Before this replacement my MacBook was doing really good actually. After ...
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0answers
691 views

What prevents macOS Mojave from sleeping my Mac?

I did some testing about activities which prevent sleep on Mojave: It seems that when the display shows a moving image, even if on a background app (such as a youtube video mostly stopped by Finder ...
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0answers
20 views

I have a MBP 2010 and just got a slightly newer one 2012 I needed 16 GB ram and my 2010 could only take 8gb

I had upgraded the 2010 mac to a 500gb ssd and replace the optical drive with a caddy and 2 tb firecuda hdsc hybrid drive . It all works fine on my 2010 mac. So my 2012 MBP came with optical drive and ...
3
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0answers
191 views

Is it normal for Mac to make startup sound every morning?

If I'm not using it, about 8:00 every morning my sleeping MacBook Pro (with lid shut) makes a starting up sound (the sound of the hardware, not any system sound). I guess it wakes up by itself. What ...
1
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1answer
264 views

MacBook Pro won't put external display to sleep when idle

I have a Mid-2015 MacBook Pro running High Sierra. I mostly use it as a desktop, in clamshell mode with an external monitor and keyboard. I just replaced the 24-inch LG monitor that was connected ...
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0answers
239 views

My MacBook Air (13-inch, 2017) does not go to sleep after Mojave update [10.14.3]

Ever since upgrading to the latest version of Mojave[10.14.3], my MacBook Air (MBA) (13-inch, 2017) refuses to sleep with the lid down in the default settings on battery power. This leads to severe ...
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0answers
27 views

Automatically change power settings

This question got me thinking: What are all of the settings you could manipulate with the same command-line application, and what are their codes? Although I don't frequently run low on battery, it ...
1
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1answer
78 views

Can I plug my 15" 2017 MacBook Pro into a USB-C display while using the charger cable?

I've bought myself a Dell U2719DC display, which allows your device to charge when connected via USB C. However the maximum charging ability is capped at 65W, whereas the stock 15" MacBook Pro charger ...
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0answers
38 views

“Energy Saver” -> “Turn display off after” value restores after reboot, how to fix it?

I have a mac mini: Since my monitor doesn't play well with it, which takes a very long time to display correctly after system sleep, I changed the "Energy Saver" -> "turn display off after" to "never"...
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1answer
21 views

Mac screen stays lit on login prompt

My 2013 iMac running Mojave 10.14.3 has had this problem for a number of years and spans a few OS upgrades. When in locked mode, the screen can stay lit indefinitely, until I hit Esc. Behavior is ...
1
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1answer
1k views

Resetting screen brightness setting in touchbar MacBook Pro during boot

Due to a series of unfortunate events, my 2018 15” MacBook Pro found itself out of battery and with screen brightness set to zero. I should also mention that I have FileVault full disk encryption ...
1
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2answers
616 views

How to make a Macbook Pro lock and not sleep when connected to power? [duplicate]

My 2018 MacBook Pro is connected to external displays and peripherals via a Thunderbolt 3 dock. When I step away from my desk I lock the computer by pressing ctrl+cmd+Q on my external keyboard. This ...
3
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0answers
17 views

Suspend a program when on battery power [duplicate]

I’m doing some long-running, CPU-intensive work. This means that I am tethered to a power outlet at all times. What I’d like to do is ask macOS to suspend a particular program when I’m on battery ...
0
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1answer
240 views

Is this energy usage for safari normal?

I was checking my activity monitor for Safari, and I see this number as its average energy usage. Is it normal?
2
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0answers
590 views

What is this “Screen Shot” app using so much battery?

The battery on my MacBook Pro drains very quickly compared to what other people report. When I'm running Slack, lots of Chrome tabs, and Docker for Mac and everything, that's to be expected. ...
3
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1answer
141 views

SMC sensors failure while running on battery

I have problem with SMC in MacBook Air 2016. While running on battery, data from SMC module freezes. In iStat Menus temperatures from sensors, RPMs, current meters and voltage meters from CPU aren't ...
1
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2answers
2k views

13" MacBook Pro 2017 randomly shutting down

I bought a new Mac and have had it it for like 1 week now. I noticed it turns itself off at 8% but I wasn't worried. Then it started shutting down on like 17%-20% cca. When you plug charging cable ...
1
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1answer
644 views

How to disable App Nap in 10.13.6?

I'm trying to disable App Nap for Chrome, but I can't find the checkbox anymore. Anyone know how to disable App Nap for a specific app in 10.13.6?
2
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2answers
2k views

SMC reset to fix battery not working, but cant be sure SMC reset has taken place

I have had a new battery in my mid 2012 15" macbook pro running 10.11.6 The battery health as monitored through a battery health app downloaded from the mac app store has been deteriorating ever ...
0
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1answer
308 views

My SMC keeps corrupting even after I reset it

My SMC on my 2012 mbp keeps corrupting even after I reset it. It won't wake up, forcing me to open it up, unplug and plug in the battery every once-in-a-while, which is becoming a problem because I ...
1
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0answers
134 views

Something is corrupting my SMC, why or what changes the SMC settings?

I asked a question that led up to this: Raise/lower brightness is extremely slow It works just fine after SMC Reset. But the next day same problem. It appears that the problem is that something is ...
0
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1answer
944 views

MacBook Air 13 (mid 2012) shuts down at 50% battery without warning, SMC chip broken? [duplicate]

Some weeks ago I bought a second hand MacBook Air. The MacBook Air runs fine but always shuts down without any warning at around 40-50% in battery mode. After restarting battery is at 0%. First I ...
1
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0answers
26 views

Macbook Air doesn't turn on [duplicate]

I have a 2017 Macbook Air 2017. A week ago I turned it on and wrote my password, then it shut down. I tried to turn on but nothing happened. I read some posts on the Internet and tried the following: ...
4
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1answer
1k views

Can't hibernate computer MacOS Mojave, no pmset “standby” option

I have a Mid-2009 Macbook Pro 17 inch (5,2), with MacOS Mojave 10.14 installed. I want to enable hibernation (or standby, or deep sleep, or safe sleep) in order to power off the RAM when in sleep mode....
3
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1answer
1k views

Why “wake for network access” does not work when setting CI server

We need to set up a CI server using mac. We set up our private gitlab server on the cloud and gitlab-runner on a mac at the office. When the mac does not go to sleep it works well. But when it goes ...
1
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1answer
245 views

Troubleshooting `InternalPreventSleep`

My MBPr has been draining itself frequently overnight if not plugged in. I noticed today when I had the lid open, it would unlock itself with my Apple Watch - no input from me. I looked in Console and ...