Questions tagged [power-management]

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

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21 views

SMC is in U mode, not in A mode

On a Late 2008 MacBook Pro with a dead battery, i have a SMC issue that popped out. My fans are at 100%, no keyboard backlit, the usual SMC story. I've tried the usual technique from the Internet to ...
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1answer
29 views

Power Manager not working (Connection Disrupted: Unable to connect to this Mac's Scheduler at: Service unavailable via Bonjour (dns-sd))

I had recently installed the most recent version of Power Manager, but after installing the launchdaemon/agent jobs opening the application gives me the error message "Connection Disrupted: ...
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17 views

MacBook Pro 2019 (macOS Catalina) - Is it possible to automatically increase screen brightness to 100% when plugged in?

Currently - when unplugged, the screen brightness decreases I want to keep this functionality, but in addition I want the screen brightness to automatically increase to 100% when plugged in Is there a ...
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18 views

Downgrade bootrom version on MacPro6,1

Is it possible to downgrade a bootrom on MacPro6,1 to a older version? I have read a bunch about SMCFlasher tool and How to downgrade SMC firmware (which doesn't seem valid anymore) amongst others, ...
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7answers
3k views

Is there a way to prevent my Mac from sleeping during a file copy?

I'm copying a lot of files (over 700 GB) and it takes hours to complete. Is there a way to keep the Mac from sleeping before the copy process completes? I don't want to sit by the computer and moving ...
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1answer
35 views

Disable Fans on MacBook Air 2019

Hi I'd like to disable the fans on my 2019 MacBook Air. Since it doesn't even do smth for Pooling since ist completly passive coolen (https://www.youtube.com/watch?v=iiCBYAP_Sgg, Video from Louis ...
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1answer
34 views

Prevent application to post PreventUserIdleSystemSleep

Listing processes which keep my MBP awake with pmset -g assertions shows some applications which I positively do not wish to be able to influence power management. pid 150(coreaudiod): [...
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3answers
107 views

2 Months old MacBook Pro (Mid 2020) battery only last for 4 hours

I'm new to the world of Apple, I bought a new Macbook Pro, mid-2020, Intel i7, 16GB RAM. I'm a developer, I run apps like VS Code, Sublime Text, Slack, Chrome (Multiple Windows), I play videos/songs ...
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20 views

MacBook Pro requires SMC reset after every boot when on battery

Booting my mid2015 15" MacBook Pro (with FileVault2) from battery works as expected – only that it will hibernate immediately after the user has been logged in. Then I have to perform a SMC reset ...
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74 views

Why I need to reset frequently SMC controller in my MacBook Pro with touch bar (Intel, T1 Chip)

I have a MacBook Pro with Touch Bar and an Intel processor. I need to reset the SMC controller every time I open the MacBook Pro. It does not start automatically unless I do this. I've tried many ...
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48 views

MacBook Pro battery does not charge when plugged in unless switched off / sleep

Hello Apple Stack Exchange! Apologies if this is a repeat question, perhaps because everything is a repeat answer as well is why I am here. I am having a problem with my MacBook Pro (A1398, 15”, early ...
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1answer
56 views

How could my Mac be turning the screen off when it's set to “never”?

I have a late 2021 unibody Mac Mini, upgraded to Catalina. For some time I have had problems where the monitor will not wake up from sleep even though the Mac is running - I think it's a known bug in ...
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14 views

MacBook Pro Mid 2009 17 inch ONLY boots after resetting SMC

I changed the right speaker, which required me to remove the logic board. I put everything back together and it turned on normally. When I was done using it I shut it down. After this I could not boot ...
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1answer
39 views

How to get SMC version for 2018 Mac mini

I bumped into a problem, when my USB and USB-C ports stopped working (all except 1) when coming out of sleep mode. I could fix this only by SMC reset (unplugging power for > 15 sec), after that all ...
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0answers
280 views

MacBook Pro crashing when going to sleep

I have a recently purchased MacBook Pro (16-inch, 2019) that crashes when it goes to sleep. It doesn't matter if I send it to sleep manually through the menu or by closing the lid, or if it goes to ...
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0answers
12 views

Which method of hotspotting consumes the least power from the connected device?

When a MacBook Pro is connected to an iPhone's hotspot through USB-C to lightning, the MacBook Pro will automatically charge the iPhone. This consumes additional power from the MacBook Pro's battery. ...
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1answer
239 views

Where does the pmset CPU_Speed_Limit variable come from, and how to modify it

The man page of pmset states: pmset must be run as root in order to modify any settings. Yet I cannot find out how to alter the CPU_Speed_Limit variable. I'm not a registered Apple developer, but I ...
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1answer
291 views

Macbook Air Early-2015 Service Recommended Warning [duplicate]

I have a Macbook Air Early-2015 model since 2017. Like 4 or 5 months ago, I updated from High Sierra to Mojave. Initially there was no problem. But after a few weeks my Macbook started to shutdown ...
2
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1answer
165 views

How to put MacBook to sleep using only an attached Windows keyboard?

I have a new MacBook Pro that I leave plugged in and closed because I use an external display, keyboard, and mouse. My monitor, keyboard, and mouse are also used by my PC. When I'm finished with work, ...
2
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0answers
131 views

How to reflash SMC firmware?

MacPro 2013 (MacPro6,1). The computer wake up by it-self after one or two minutes. Re-install new OS. Reset Pram, SMC. Disconnect everything except power cord. Wifi disabled. Auto-sleep after 4 ...
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1answer
71 views

MacBook Pro 2011 has faulty power button - How do I enable any key or lid open boot settings?

I'm working on an Early 2011 MacBook Pro 13" which suffered a little water damage. After cleaning the system I can get it to turn on by disconnecting the battery, then reconnecting it and ...
2
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2answers
96 views

Why will my MacBook Pro (15" Late 2016) not power on after disabling 'Boot on Lid Open'?

I wanted to disable the boot/power on by opening the lid. To do so, I entered the below command in the terminal sudo nvram AutoBoot=%03 Post that, I shut down the laptop by going to the Top Left ...
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2answers
107 views

Macbook not detecting all USB keyboard keys

I have a Macbook Pro 2019. I recently purchase the Corsair K68 RGB keyboard which has a common USB Type-A connector. I used OTG for USB A to USB C. The first time mac detects the new device. Worked ...
2
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1answer
156 views

Is there a way to bypass charge a 2019 MacBook Pro?

Bypass charging powers the computer but it doesn't charge nor discharge the battery. Can I bypass charge on a 2019 MacBook Pro?
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1answer
30 views

Is it possible to have the auto display sleep less them a minute some how?

In the System prefernces Energy Saver section you have "Display Sleep" option. The minimum time is a minute. is it possible to tweak that some how to less then a minute? Please don't add ...
2
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1answer
33 views

Besides the main battery, do any components inside MacBooks rely on any other batteries to operate?

Besides the main battery used to power Apple notebooks, do current MacBooks have any other built-in non-rechargeable batteries that may need to be replaced after a certain period of time? I was ...
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2answers
276 views

What does this statement about saving battery power on iOS mean?

While reading the iOS 14 guide by Apple here, on page 78, In the Quit and reopen an app section What does the highlighted statement mean? Is it that on iOS, the apps don’t close(terminate processes ...
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1answer
367 views

MacBook shuts down at login screen

I have an early 2015 MacBook Pro. I’ve had the service battery warning for over a year now. The battery lasts like 5min nowadays but I’ve been using it like desktop so it’s always plugged in. I just ...
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1answer
41 views

Is it possible for a Macbook Pro to pop out a window and / or give some sound a few minutes before sleeping?

Is there a way to pop out a window and / or to give out some sound a few minutes before it goes to sleep? There is one warning, but I hope to get another warning a few or a couple of few minutes ...
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0answers
52 views

DVI (via Thunderbolt) display doesn't sleep reliably

My new Mac Mini (late 2018) has 3 monitors connected - one via HDMI and two Thunderbolt-to-DVI. The two DVI monitors are both HP 2011x, and I had them previously connected to a now-retired Mac Pro, ...
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0answers
19 views

Keep external monitor connected when computer is locked

On my 2016 MBP with an external monitor connected through DisplayPort, when I lock my computer, the monitor is immediately "disconnected", so when I unlock my computer, it takes up to 15 ...
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1answer
35 views

Is there a way to have my macbook set its brightness based on it running from battery or from line power?

Basically I'd like to have one brightness setting configured for when I'm plugged in through the adapter and charging the macbook from wall power, vs a lower brightness setting when I'm running off ...
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1answer
20 views

iPod is not Charging

When I connect my iPod shuffle to my computer it is not pulling up the profile that I can put music on normally it will pull up but it not pulling it up for me, and it won't charge it. Another thing ...
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1answer
253 views

How to find watt hours of MacBook?

I see the latests Macbook Pro 16" has a 100 watthour battery - how do I find the equivalent stat for my current Macbook given the info under About -> System Report -> Hardware -> Battery ...
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1answer
99 views

Can “Discrete only” GPU cause slowness?

I have 2 external monitors to my 2017 Macbook Pro v.10.15.6. Sometimes it slows -- the mouse lags badly. I installed gfxCardStatus and sometimes the menu choice changes from Dynamic switching to ...
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1answer
73 views

Mac book air is not turning on and getting cricket noise when press power button

My Mac book is not turning on when pressing power button . I can hear a cricket sound when ever I press power button. Initially it was turning on when I do SMC reset . But now power is full and ...
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0answers
18 views

MacBook Pro battery not charging error - long term fix [duplicate]

I have a 2018 MacBook Pro 13 inch (the one without the touchbar). Over the past weeks, I have twice faced the situation where the charger is plugged in but the battery is draning and I get a "...
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0answers
30 views

Odd OS X behavior when it goes to sleep - returned to Login, said it shut down bc of a problem

I have posted something like this before, I run a 2012 MBP with Catalina. The odd behavior is that if I close the lid the machine seems to shut down completely (even with the power connected) and ...
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1answer
49 views

MacBook Air SMC Update v1.8

MacBook Air SMC Update v1.8 This update addresses a rare issue on some Apple notebooks where a battery that has accumulated more than 1000 charge cycles may unexpectedly shut down or stop functioning. ...
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1answer
295 views

Why does Automatic Graphics Switching keep re-enabling itself without my involvement?

I disable Automatic graphics switching under Energy Saver, as it significantly slows my Macbook Pro (10.15.5). Yet this checkbox keeps getting re-enabled when I have not touched it! How can I prevent ...
1
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1answer
877 views

My Mac crashes and shuts down when charger is unplugged, not immediately

Hey so my Macbook Pro (Retina 15" 2014 i7 2.6GHz, High Sierra (institute doesn't allow me to update)) is turning itself off randomly, and as far as I've figured out this will only occur when the power ...
2
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2answers
755 views

“Battery Health” in macOS Catalina 10.15.5?

I have just installed the macOS Catalina 10.15.5 update on my 11" Mid 2013 MacBook Air. The update is working fine. The MacBook Air specifications on the Wikipedia page says that this model has a ...
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0answers
2k views

Apple Diagnostic Result PFM006 and Kernel_Task taking upto 300 % of CPU and Depleted Battery

My Macbook Air (2018) Retina battery has depleted within 130 cycles. I was running Windows via Bootcamp in heavy load, letting it discharge fully and charge repeatedly. If I unplug from power source ...
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0answers
54 views

MacOs PreventUserIdleDisplaySleep is 1 without any assertion and the computer is not turning off the display

I have noticed that the Apple Display of my docked MBP was on. After a little digging, I found that the assertion for display was on but there was no process claiming it. How can this be possible? $ ...
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0answers
24 views

Does booting into windows causes start-up issues such as hibernation?

I am using MacBook Air 2019 running OS X Catalina. For the past few weeks, I have been facing the issue with regard to my mac going to hibernate. This hasn't been the issue since I bought the mac this ...
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0answers
23 views

MacBook Pro 15-inches display not working: how to isolate the cause of the issue?

On last Saturday I left my MacBook Pro (15-inches display, mid-2012 release) on during the night in order to finish some backup tasks and I scheduled its shutdown for a certain time using shutdown -h. ...
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1answer
69 views

Macbook Pro 5,1 will only boot after multiple SMC resets

I have a Macbook Pro 5,1 (late 2008) running El Capitan (10.11), which is the latest officially supported OS for that machine. When I turn it off I cannot turn it back on without resetting the SMC ...
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1answer
2k views

Reset SMC without keyboard

My MBP (13-inch, 2017, Four Thunderbolt 3 Ports) has been hit by a small object on its keyboard. I was thinking it didn't get any damage, but several keys are not working anymore and the keyboard ...
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0answers
46 views

MBP retina 2015 won’t power on after SMC reset

I was using my computer while it was plugged in and the light on the Magsafe charging cable was green. I noticed at the top that the battery indicator was at 78% and was not indicating it was charging....
0
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1answer
164 views

Black Screen on 13" Macbook Pro 2019/Catalina. Resetting NVRAM/PRAM, SMC does not work

My wife's Macbook Pro suddenly dropped to a black screen with the power still on; keys light up, caps lock light comes on; display is clearly getting power. Holding down the power button kills power ...

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