Before you can see what problems can be solved by reset SMC (System Management Controller), let's see What does SMC And what this controller is dealing with Desktop Mac computers and MacBook laptops.
SMC is liable for a series of functions lower level (low-level) of MAC computers equipped both with Intel processors, as well as with Apple Silicon.
- is responsible for thermal management - accelerate or reduce the speed of rotation of fan fan (fan speed / cooler) Depending on the soil and temperature of the processor CPU.
- check ambient light - in function De Care automatically sets the display brightnessand starts or stops the light keyboard.
- is responsible for the motion sensor (Sudden Motion Sensor) – SMS
- MAC response when the button is pressed Power - Apparently this button is mechanical, but its functions are based on sensors. Especially in the case of the MacBook Pro, the model Touch Bar where he plays a role and of sensor for Touch ID. SMC also responds to the action of MAC when the button is pressed ”Power". To open, close or put the computer in standby.
- MacBook, MacBook Pro or MacBook Air reply to closing and opening the lid / flap. Lid.
- battery management - administer energy resources and displays the report for the battery status. The load level and the applications that require it the most
- keyboard illumination
- lights indicate battery status -The older models of MacBook laptops that have a button on the side, which if pressed shows by the battery charging level, even if the MacBook is closed.
- Selecting an external video source (instead of internal) for some IMAC displays.
Table of Contents
What are the problems of an IMAC Pro, Mac, MacBook or MacBook Pro which can be solved by resetting SMC (System Management Controller)
because SMC (System Management Controller) deals with the wide range of sensors and Mac functions, resetting this control system is required in situations where:
1. Fans (fan / cooler) runs at high speeds (become and noisy in this scenario), when the CPU is not called for intense and ventilation is done properly. References about correct ventilation and optimal temperatures of the operation of a MacBook, you can find them here.
2. Backlight keyboard behaves incorrectly. Either the keyboard does not light when it is dark in the room, or no longer responds to the light intensity settings.
3. Status indicator light battery (side LEDs, for models where they exist) behave incorrectly. It does not realize the energy level of the battery or they do not light at all.
4. Illuminate the display does not work correctly when changing light from the ambient environment. The light of the display (Display Brightness) remains unchanged even if the ambient light changes. However, attention to the settings. On many models of MacBook this function can be activated or deactivated from settings. System Preferences → Displays → Automatically adjust brightness.
5. Mac It does not respond to pressing the "Power" button. Does not start or close.
6. MacBook does not respond correctly when you open or close the lid (flap / lid). Normally, when closing the MacBook lid, it must enter "Sleep" mode. If this does not happen and the system remains on, SMC reset can be the solution.
On the MacBook Pro 2017, the model Touch Bar, the system starts automatically when you open the lid even if initially the system has been completely closed. Shut down. You can activate or deactivate the automatic opening of the system at the opening of the lid, following This tutorial on the iHowTo.Tips.
7. Macul Enter suddenly in "Sleep" mode or stop and You can no longer start.
8. MacBook or MacBook Pro no longer load through the portUSB-C. New MacBook and MacBook Pro models are only provided with USB-C ports, and among them also offer support / load.
9. The battery does not load correctly.
10. MacBook or MacBook Pro doesn't recognize the external devices connected via USB-C. External hard drive, mouse. keyboard, USB-C adapters and others.
11. LEDthe on charging adapter (MagSafe) does not indicate a correct activity of the load level. If MacBook has a battery charged at 100%, it must be green. Otherwise it is blazing orange / Red.
12. Mac It works unusually slow even if the processor is not requested. CPU. Check in Activity Monitor if there are processes that can lead to slow running of the system, before resetting SMC.
13. Mac no more passing on his display when an external display connected becomes unavailable.
16. Lighting around the ports of entry / Exit for Mac Pro (Late 2013) is no longer properly done.
There may be other problems that can be solved by resetting SMC (System Management Controller), but the above are indicated by Apple as well -founded reasons to do so.
Reset SMC (System Management Controller) will be used as the last measure to solve a problem.
The steps to be followed before resetting SMC (System Management Controller)
Try each of these steps in order, before SMC reset. After each step check if the problem persists.
1. If Mac / MacBook is open but remains blocked and no longer respond to any command, hold the Power button for a few seconds until it stops everything. Shut Down. Unfortunately, the sheets you work in in various editing applications, creation will be lost.
Press the button again ”Power"For restarting the system.
2. Press Command-Option-Escape To close an application that no longer responds and can no longer be closed by normal command. Command – Q.
3. Put Mac in the mode ”Sleep" from Apple (left-handed corner) → Sleep, then remove Mac from the mode ”sleep"By pressing any key.
4. Restart Your Mac from: Apple → Restart. Check if after restart the problem persists.
5. Close Mac FROM Apple → Shut Down, wait a few seconds then restart the system.
If you are using a laptop and MacBook battery related problems, follow the steps:
1. Disconnect the power cable from the Mac and the adapter from the wall outlet. Wait for a few seconds, then connect.
2. Close Mac (Apple → Shut Down)
3. After the Mac has closed everything, remove the battery (if it is removable), wait a few seconds and then put the battery.
4. Press the button ”Power"To restart the system.
If after these steps the problem has not been solved, then you will have to proceed to the SMC (System Management Controller).
How do you reset SMC (System Management Controller) on a MacBook laptop
Before you follow the steps in the tutorial, Check whether or not your laptop has removable battery. Models of older 2008 - 2009 are with removable batteries, and newer models, includingMacbook Pro (Early 2009) and newer, all models of MacBook Air, MacBook (Late 2009) and MacBook (Retina, 12-Inch, Early 2015 and Newer) are provided with indatable built-in batteries.
Resetting the SMC on MacBook Battery Kit
1. Inchideti MacBook (Apple → Shut Down)
2. Keep the keys press Shift-Control-Option from the left of the keyboard and the Power button. Press the keys and the "Power" button for 10 seconds. (If you have a MacBook Pro with fingerprint sensor Touch ID, it plays the role of button "Power"Press him)
3. After 10 seconds release both the keys and the button.
4. Press the Power button and turn on MacBook.
MacBook SMC reset removable battery
1. Close MacBook (Apple → Shut Down)
2. Detach the MacBook battery - if you need the assistance to do this, contact an authorized Apple service.
3. Keep the Power button for 5 seconds.
4. Reinstal / coupling the battery
5. Press the "Power" button to start the system.
Reset SMC (System Management Controller) on MAC computers (desktop)
This tutorial is for iMac, Mac mini, Mac Pro or Xserve.
1. Stop Mac.
2. After it has stopped, disconnect the power cord and wait for 15 seconds.
3. Insert the power cottage back and wait 5 seconds.
4. Reboot Mac from the button.
SMC reset for IMAC Pro
1. Stop iMac Pro.
2. After the system has stopped, press and hold the button "Power"Time 8 seconds.
3. After 8 seconds, release the button and wait a few seconds.
4. Press the "" button againPower"To start iMac Pro.
After reset SMC (System Management Controller), all functions should work in normal parameters. If this does not meet, contact a Apple authorized service from your area.
*Reset SMC (System Management Controller) not the same as reset NVRAM or PRAM.
Hi, I have
A
Imac 2015, 27, I gave him to update and told me that he did not go to the end, restarted and remained with the Mac logo and the up to half -loading bar, what to do?