Questions tagged [power-management]

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

Filter by
Sorted by
Tagged with
2
votes
2answers
28 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
vote
0answers
27 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 ...
1
vote
0answers
8 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
votes
0answers
16 views

Macbook Pro (Mid 2015) won't turn on even without battery connected, Magsafe light is amber

My Macbook Pro (Mid 2015) won't turn on. I recently replaced the keyboard and after putting everything back together and turning it on, the condition of the battery said "replace now", i didn't have ...
0
votes
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 ...
1
vote
0answers
17 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
votes
0answers
26 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
vote
1answer
74 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 ...
0
votes
0answers
529 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 ...
1
vote
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
votes
0answers
112 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
vote
1answer
108 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 ...
0
votes
0answers
132 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 ...
0
votes
0answers
18 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
vote
1answer
56 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 ...
0
votes
0answers
25 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"...
0
votes
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
vote
1answer
691 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
vote
2answers
349 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
votes
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
votes
1answer
192 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?
1
vote
0answers
330 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
votes
1answer
94 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
vote
2answers
1k 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
vote
1answer
374 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?
1
vote
0answers
30 views

Macbook Pro SMC reset

I have a macbook pro 15" late 2013, I removed my dead battery and I am waiting for a new one from ifixt. Do I need to reset the SMC before installing the newer battery or should I wait till I fully ...
2
votes
2answers
1k 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
votes
1answer
204 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
vote
0answers
132 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
votes
1answer
690 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
vote
0answers
25 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
votes
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
votes
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
vote
1answer
168 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 ...
2
votes
3answers
2k views

Black screen on MacBook Pro login

I'm getting a completely black screen any time I log into my MacBook. I enter login details and hit enter. It was getting about half way through progress bar displayed after this and then screen just ...
1
vote
1answer
67 views

Preferred Order of NVRAM/PRAM, SMC, and OS resets

Is there a preferred order in which I should reset the NVRAM/PRAM, SMC, and OS on my MBP? If so, what is this order (and why)? Edit: I intend to do all of them to completely reset my computer. No ...
3
votes
2answers
1k views

Mac fan speeds really high

I am using istats to see the speed of my fans: I ran a diagnostic by holding down d during a restart and it came up without any errors. I've also reset pram and the readings are still really high. Is ...
3
votes
1answer
93 views

My MacBook Pro touch bar 13" isn't starting

My MacBook Pro touch bar 13" isn't starting and here's what I'm seeing: 1) No power - I can't hear blowers or any sound or see any activity on the backlight when I press the power button/touch ID 2) ...
1
vote
1answer
19 views

What can I do when the power button does not put the macbook to sleep?

I have this randomly recurring problem that a short press on the power button will not cause my Mbp mid-2012 to sleep. Besides that, everything is normal, i.e. I can still use it to power off and I ...
2
votes
1answer
189 views

Power consumption of iMac

All other things being equal, what is the difference in power consumption of iMac with 8GB of RAM and iMac with 16 GB RAM?
2
votes
3answers
784 views

Mac Pro goes to sleep despite settings

My Energy Saver system preferences look like this: The thing is, I don’t want my Mac to ever go sleep — especially last night when I had Handbrake transcoding a ton of important files I was expecting ...
0
votes
1answer
640 views

SMC Fan Control Causing random freezing and crashing

After experiencing crashing and freezing on 15" MacBook Pro 2017 (macOS High Sierra), I started eliminating running programs that I thought might be causing the crashing as advised by an apple support ...
2
votes
0answers
39 views

Let connected device know about the maximum 2.1A output of a USB port via software

I am fairly technical and I was wondering if there are any software based hacks or modifications that I can apply to force the maximum of 2.1A to be supplied through a USB port without the attached ...
5
votes
2answers
6k views

Removing the sleepimage file in /var/vm in macOS permanently

I run high sierra, and the large private/var/vm/sleepimage file has been bothering me. My computer has 16 GB of ram, which means sleepimage takes up 16 GB on my drive. I have read tutorials on how to ...
0
votes
1answer
164 views

pmset -g: UPS Power -1; AC Power -1*

When issuing the command pmset -g in macOS (tested on El Capitan through High Sierra) the first two lines come up about the active UPS and AC profile: Active Profiles: UPS Power -1 AC Power ...
1
vote
1answer
1k views

Understanding Mac Battery Information

In System Information, we can obtain information about the battery, e.g.: Battery Information: Model Information: Serial Number: D866192Q1NFFWLKE1 Manufacturer: SMP Device Name: ...
1
vote
1answer
178 views

On iPhone 5s, can the battery itself be the cause of fast draining, even after a brand new U2 chip is installed?

My battery was draining very fast even when UNUSED and in LOW POWER MODE. This was happening even in AIRPLANE mode (i.e. overnight, unused, in Airplane and Low Power Modes both enabled). I got the ...
1
vote
1answer
95 views

Force MacBook to drain the battery while connected to charger

I leave my MacBook Pro on my desk nearly all the time, connected to the charger with the lid closed, connected to an external display. I've heard this is bad for the battery health, and everyone in ...
4
votes
2answers
678 views

Mac turns off the power supply when it sleeps

I'm send my laptop to sleep ( -> Sleep) and when I open it later, it starts loading system from the beggining as if I powered off it. I lose progress in my work because of this. I don't found where I ...
1
vote
2answers
136 views

Macbook A1181 Shuts down after a few minutes [closed]

My dinosaur macbook randomly shuts down. I've reset the SMC and it still shuts down. Even the computer doesnt know its coming because you can hear the arm inside the hard drive clunk as it shuts down. ...