Possible causes
Power supply malfunction
If the power supply has failed and the battery is dead, of course the Mac will not turn on. Need to check with a different power supply.
Keypad malfunction
In macs, the power button is part of the keyboard. Button failure is usually related to flooding. Even a small amount of liquid can cause such a breakdown, because the power button is always live, even when the MacBook is turned off. And the symbiosis of liquid and electricity leads to oxidation, corrosion and destruction of the conductive layer.
Deep battery drain or power failures
Sometimes when the battery is very low, the Mac goes into a kind of stupor. Stops turning on and responding to charging (no light comes on). You disconnect the battery and wait a few seconds for the board to de-energize
MagSafe connector malfunction
If the power connector (MagSafe) has failed and the battery is dead, we get the same situation as with a faulty.
Liquid ingress
Flooding can cause a wide variety of damage. From keyboard failure to oxidation and motherboard short circuits.
Faulty motherboard board
If the macbook does not turn on and all the options described above have been eliminated, then the motherboard is still faulty. often than not, if it doesn’t turn on, the problem is in the power circuits, and there are more than a dozen different voltages on the board. But the problem can also be in the multicontroller and chipset. Generally, there are a lot of nuances and it is a separate topic for a separate article. We’ll be sure to write one of these.
MacBook discharges when closed
The problem seems to affect a wide range of Macs, but is understandably limited to portable models with a built-in battery. Owners of models based both on Intel processors, and on M-series chips manufactured by Apple, have been complaining about the premature discharging of their MacBooks. So the problem is not in their hardware, but caused by a software glitch triggered by the update to macOS 12.2.
MacBook batteries drain to zero in just a few hours of inactivity
Some users have tried to determine the cause of the premature discharging through Terminal and found that their laptops forcefully activate the connected Bluetooth accessories. This happens precisely in sleep mode, when the user does not notice it. Accessories use the DarkWake from Deep Idle command, causing laptops to wake up and fail to fully go to sleep. The result: In just a few hours, a MacBook battery is drained to near zero.
Be sure to read: What to do if the keyboard doesn’t work on your MacBook. Only the best solutions to the problem.
Apple has already responded to the problem and suggested that affected users change their battery settings by activating some power efficiency settings. Needless to say, none of this helps. But we can’t not list these settings anyway. So go to Apple’s System Settings Power Saving (Battery) Battery menu and follow the further instructions.
Save your Mac’s battery by using it in cradle mode without a power adapter
Now that we know that the problem is that the MacBook goes into sleep mode when the lid is closed, even if it has an external display connected, the solution is simple. We need to prevent this sleep. But you can’t just use a simple app like caffeine to solve this problem. That’s because the hall sensor on your MacBook detects when the lid is closed and simply puts it into sleep mode, regardless of everything else.
Using a third-party app
You must have heard of the Amphetamine app, which is an extremely popular Mac app that monitors sleep states for Macs based on triggers and other factors. Although the app originally had no way to solve our problem, it has since been updated and can really help us out of this situation.
- You will see a pop-up window warning you that you need to install Amphetamine Enhancer. This is optional, but recommended. You can simply click on the button labeled “Get amp amp” to go to the website and download the auxiliary app. Or just click here to download it.
- Install Amphetamine Enhancer and run it. Select “Closed Display Failure Mode” on the sidebar and click “Install”.
That’s it, you can now use your MacBook in clamshell mode without plugging in the AC power adapter.
Using terminal commands
If you don’t want to use a third-party application to do this, or just want to play around with Terminal commands and figure things out on your own, there are several commands that can achieve similar results.
Note. I haven’t tested these commands because Apple recommends not changing hibernation mode with the pmset command, and these commands do just that. However, these commands will shut down your laptop in sleep mode when you close the lid, so they should also solve the problem of not being able to use your laptop in cradle mode without a power adapter. Nevertheless, use them at your own risk.
With this warning, here’s what you need to do.
sudo pmset.a sleep 0 sudo pmset.a hibernatemode 0 sudo pmset.a disables sleep 1
These commands will disable sleep mode on your MacBook, and you can use your Mac in cradle mode without the AC adapter plugged in.
You can always undo the changes by running the following commands in the terminal
sudo pmset.a sleep 1 sudo pmset.a hibernatemode sudo pmset.a disables sleep 0
How to disable SpeedStep when using MacBook Pro without battery?
Recently, my battery accidentally died and I had to unplug it or my computer wouldn’t turn on properly (MacBook Pro would reboot and shut down over and over).
Now, every time I plug in the power cord, it would immediately start (even without pressing the power button), shut down after a few seconds, and then start up normally. Weird.
However, the main problem is that after a while the laptop becomes VERY slow. By “VERY slow” I mean. games become unplayable (FPS drops from 60 to 6) and kernel_task starts using more than 500% of CPU. Also, the mouse speed increases significantly.
I tried INTERROCK. х (10. (y post) guide. But that doesn’t seem to work right and made me core panic. related to SleepEnabler.
PS I read somewhere that Apple is intentionally doing this “overclocking” for security or marketing purposes (to buy a new battery). Please correct me if I’m wrong.
OS X would intelligently adjust the CPU based on certain conditions to a) extend battery life and b) avoid system damage (due to excessive heat). Apple is not “sabotaging” machines to get customers to buy new batteries cksum
Any help would be appreciated. Thanks in advance.
How to disable SpeedStep when using a MacBook Pro without a battery?
Recently, my battery accidentally died and I had to unplug it or else my computer couldn’t turn on properly (the MacBook Pro would reboot and shut down over and over again).
Now every time I plug in the power cord, it immediately turns on (even without pressing the power button), turns off after a few seconds, and then turns on normally. Strange.
However, the main problem is that after a while the notebook becomes VERY slow. By “VERY slow” I mean. Games become unplayable (FPS drops from 60 to 6) and task_kernel starts using more than 500% of CPU. What’s more, the mouse speed increases significantly.
I tried interrock’s (10th post) guide, but it doesn’t seem to work correctly and caused me to have kernel panic related to SleepEnabler.
P.S. I read somewhere that Apple does this “underclocking” intentionally, for security or marketing reasons (to buy a new battery). Please correct me if I’m wrong.
How to turn on MacBook Pro without battery. one-shot video
OS X will intelligently throttle the CPU based on certain conditions in an attempt to a) extend battery life and b) avoid system damage (due to excessive heat). Apple does not “sabotage” machines in an attempt to get customers to buy new cksum batteries
Any help would be appreciated. Thanks in advance.
About a year ago I came across a post here where TC explained how to order the kitchen directly from the factory, to avoid extra charge from the showroom and other extra fees, with links to the manufacturers and other useful information. I am in the midst of ordering a new kitchen and the pricing in the showrooms has been very disappointing so far. Scrolled through all the saved, but I can not find that post.
Post unrated, please raise it higher, maybe someone will see and share the link. Region Moscow and MO.
Resolve your MacBook battery problem
Occasionally, MacBook Pro and MacBook Air owners complain about the problem of a cross appearing in the battery icon in the top OS X menu, and the system reports no battery when you bring up the battery menu. All this is usually accompanied by a loud roar of the fan and slowing of the laptop. Previously, it was assumed that to solve this problem, it was necessary to take the machine to a service center. However, today we will tell you how you can get rid of this nuisance on your own.
In addition to the symptoms described above, users also complain that the laptop refuses to go to sleep mode, and the MagSafe charging light stops lighting up. The saddest part is that even rebooting your computer doesn’t help solve the problem. But there is a remedy, and for this you will not even need to try to climb inside your aluminum darling.
The solution, in short, is to reset the System Management Controller (SMC). Technically, the implementation of this process is quite simple and applies to the MacBook Air, MacBook Pro, and all other Apple laptops with non-removable batteries.
First, unplug your MacBook and reconnect the MagSafe adapter. Make sure your computer is completely shut down. After that you need to press and hold the ShiftControlOption key and the power button sequentially for 15 seconds. Then press the power button again to turn the laptop on.
After turning on the battery should work as usual: the indicator with a cross on the battery will disappear, and the fans will stop making noise. If the problem remains, then we are most likely talking about mechanical damage, and you really should contact a specialist. By the way, keep in mind that resetting the SMC will also reset all power settings in OS X and you will have to re-set your preferences.
Should you turn off your MacBook?
Most Windows notebook users are used to always turning off their devices. Things aren’t so clear-cut when it comes to Macs, however. Some people think you should turn off your computer every time you don’t need it. Others turn off their laptop at night and think they are conserving their device’s battery. Others leave the laptop on 24/7. Today I propose to sort out who’s right, who’s wrong, and discuss all the nuances of turning your MacBook on and off.
The issue of turning off your MacBook is on many people’s minds. Not everyone knows the solution.
I personally belong to the category of users who never turn off their computers. It is clear that before appearance of MacBook in my collection, I, probably, like everyone else, used to turn off my laptop every day. Doubts were planted in my head by a friend, looking at me disapprovingly, as I stowed my sleeping Mac in my backpack before my flight.
First of all I would like to see some kind of recommendation from Apple itself. Let’s not beat around the bush and say that Cupertino says nothing about the MacBook shutdown. At least I could not find it in official sources. On the other hand, if Apple wanted users to reboot their devices or give them time to rest, I think we would know about it.
There is nothing to talk about power efficiency and quality adaptation of the MacBook system. It’s clear to everyone that she’s on top of it. So I propose to disassemble the three scenarios described above.
What to do if the macbook does not turn on
If suddenly, no matter what you do, the macbook does not turn on, you do not have to rush to the service center. It is quite possible to try to “reanimate” it at home. typical problems are known and it is quite easy to fix them. The only exceptions. mechanical damage and flooding with any liquid, be it plain water, chemical liquid, alcohol or sweet drink.
Another reason to immediately contact the service. the smell of burning and pop.
Most often it is the charger and power connector, the controller, less often. a short circuit and a system error. The rarest, but most severe case is a crack in the motherboard or hard drive.
