Questions tagged [power-management]
Questions about with tracking and reducing power-drain for computers or devices.
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42 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
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0answers
19 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
25 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 ...
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1answer
18 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
25 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
10 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
30 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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17 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
18 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 ...
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0answers
26 views
Why are none of the USB ports on my 2017 non-TB macbook pro working?
A while back, one of my USB ports on my 2017 non-TB macbook pro stopped working. I went to the apple store and the guy told me nothing other than “you should’ve gotten apple care”, so I just went ...
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0answers
151 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 ...
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2answers
78 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
16 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 ...
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1answer
76 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?
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0answers
85 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
39 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 ...
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2answers
281 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 ...
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1answer
108 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?
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0answers
26 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
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2answers
824 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
95 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 ...
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0answers
126 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 ...
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1answer
364 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 ...
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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:
...
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0answers
406 views
Can't hibernate computer MacOS High Sierra, no pmset “standby” option
I have a Mid-2009 Macbook Pro 17 inch (5,2), with MacOS High Sierra 10.13.6 installed. I want to enable hibernation (or standby, or deep sleep, or safe sleep) in order to power off the RAM when in ...
3
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1answer
730 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 ...
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vote
1answer
90 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
986 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
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1answer
46 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
867 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
61 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) ...
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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
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1answer
136 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?
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3answers
267 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
466 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
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0answers
36 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 ...
4
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2answers
4k 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 ...
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1answer
123 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 ...
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1answer
544 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: ...
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1answer
143 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 ...
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1answer
68 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
566 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 ...
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vote
2answers
90 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. ...
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0answers
45 views
Underclock retina iMac [duplicate]
My iMac is wonderfully performant, but under extended load it sounds like a hive of angry bees.
I am using Turbo Boost Switcher to avoid using up all the CPU headroom, but for multithreaded ...
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0answers
715 views
Malfunctioning USB-C to Ethernet hub - SOLVED
My Macbook Pro 15inch with the touchbar stopped recognizing my external USB-C adapter Sinstar 8 in 1 Aluminum Multi Port Adapter
. I should clarify perhaps, the HDMI port still works fine, but the ...
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0answers
173 views
Macbook turns off before battery is 0% when left unplugged. (Already reset SMC and PRAM several times) [duplicate]
This is my first question on this forum. My MacBook has been turning off randomly when left unplugged. It shuts down before the battery indicator reaches 0%. I have reset the SMC and PRAM several ...
3
votes
1answer
1k views
Power button not working on Macbook PRO 13" 2013 - ideas on how to reset SMC
We have a 2013 13" MacBook Pro that is behaving strangely on the keyboard. As far as we are aware there has been no water damage to this MacBook.
Symptom:
Power Button on keyboard shutdowns but won'...
2
votes
1answer
386 views
MacBook Pro tries to shutdown every X hours
My Macbook Pro is trying to shutdown itself every X amount of hours, is there a way to check in the logs what process is triggering the shutdown process?
I can see the following in the logs, but not ...
2
votes
2answers
174 views
Cannot alter MBP Power Management Settings
I've got this problem where I can't alter some pmset values in Terminal.
I can change them, the changes are registered with pmset -g, but they are ignored.
Example:
pmset acwake 0
but Mac still ...
1
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0answers
114 views
Can I force my MacBook to only charge from the USB-C device I select? Or forbid it from charging from devices I know to be unreliable?
For some reason, my MacBook keeps trying to charge off of my external display's USB Type-C ("USB-C") link even though I have a more powerful source connected.
I care because the monitor is ...
