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If you’ve ever accidentally lost a MacBook Air or MacBook Pro battery, it can be a confusing feeling. This is often accompanied by a battery menu with an “X” saying “No batteries available,” Mac is very slow, and even after a restart, the Mac often has fans running at full speed in despite nothing unusual appearing in the Activity Monitor. In addition, the MagSafe charger light is usually not on and the computer does not even sleep. Oh, something is terribly wrong, right? Well, sort of – but don’t worry, this is all related, and it can be fixed.
Before we get into the specifics or details, let’s discuss the solution: SMC reset.
Recharge the battery and return the fan to normal by resetting the SMC
This is a technical process, but it is easy to follow. This is the same for MacBook Air and MacBook Pro Retina technologies, on which almost all Macs have a built-in removable battery. Here’s how to get directions for other Macs and older Macs.
- Turn off your MacBook and plug in the MagSafe power adapter – let your Mac shut down completely before continuing
- Hold down Shift + Control + Option + Power at the same time for a few seconds, then release
- Press the power button as usual to turn on your MacBook
Here are the exact key combinations for what an SMC reset looks like on a MacBook Air or MacBook Pro (Retina) keyboard:
When the Mac restarts normally, things should be fine again. Here is an example from the “Batteries not available” menu, and after the repair is assigned, the battery will return to normal operation:
Note that the total time on the clock is 2 minutes. In other words, it only took two minutes to fix the entire problem, counting all the power issues, saving an important file or two, shutting down the Mac, restoring SMC with the keyboard above, and restarting the Mac back to normal.
The power settings are also reset
It’s important to note that SMC Restore will lose many of the power-specific options and customizations you may have made on OS X through System Preferences, from screen brightness levels to Energy Saver settings, to the how your Mac handles things like automatic dimming based on lighting. and power sources, sleep screen, hibernation, etc. So you have to go back and do these little power adjustments again.
Why is this happening?
You won’t always find the exact reason why a system management controller goes fragmented with the kernel and power functions, but the basic idea is that something went wrong at some point, maybe for a reason or not.
What is SMC anyway?
For those who don’t know, SMC stands for System Management Controller, and handles power functions and other core device roles on a Mac, so unexplained power management issues are almost always resolved by restoring SMC. For this reason, there are power management problems or strange conditions like running out of batteries, refusing to sleep, Mac very slow with the system fan turning on high, graphics cards appearing, all very classic signs that a big SMC reset to get things going. back on. continue Take the time to do it, it works.
Having seen this twice on two different Macs in the last week, it’s definitely a useful topic to deal with, even if it’s a relatively uncommon problem. At the very least, it will help you get information on things like this, so if any of the above happens to you, take a moment before calling AppleCare or making a trip to the Genius Bar, SMC will reset itself, it almost certainly solves the problem completely.
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