Restart Smc Macbook Pro

Posted onby

Mar 24, 2021 How to do MacBook, MacBook Air, or MacBook Pro SMC reset when it contains a non-removable battery (mostly before 2018): Shut down the MacBook. Unplug the power cord. Press Shift + Control + Option on the left side of the keyboard. Resetting SMC on MacBook Air / Pro (2018 and later) – Part 1 Go to the  Apple menu and choose “Shut Down” to turn off the Mac After the Mac is turned off, press and hold the Power button for 10 seconds Release holding the power button, then wait a few more seconds.

Sometimes, your Mac just acts strangely for no obvious reason. There are times when the lights don’t work correctly. There are also instances when your system settings are all messed up. Worse, your Mac just won’t boot at all.

Well, fret not. The good news is you can resolve some of these problems as easy as pie. While some of them can be easily fixed by closing all the active apps and restarting your Mac, others require to reset the NVRAM, PRAM, and SMC.

But what are an SMC, an NVRAM, and a PRAM and how do you reset them?

What Is an SMC?

SMC stands for System Management Controller. It is simply a chip that is embedded in Intel-based Macs. It is responsible for running most parts of your Mac, including the keyboards, external peripherals, LED indicators, power buttons, and cooling fans. It is also involved in running the hard drive and power supply, and it plays a vital role in how your Mac behaves while in sleep mode.

Pro Tip: Scan your Mac for performance issues, junk files, harmful apps, and security threats
that can cause system issues or slow performance.

Free Scan for Mac Issues

Special offer. About Outbyte, uninstall instructions, EULA, Privacy Policy.

When Is an SMC Reset Required?

Whenever you find out that your Mac’s hardware is acting up, it is probably worth resetting the SMC. After all, it is responsible for a lot of functions on your Mac. But when can you really tell that a reset is necessary? Here are a few potential signs to look out for:

  • The status lights and the battery indicator act strangely.
  • The backlight of the keyboard doesn’t seem to be working properly.
  • Your MacBook does not switch on when you press the Power
  • The power adapter LED indicator does not light up.
  • The fan is running, but at an abnormally high rate.
  • The trackpad is not working.
  • You cannot connect to a WiFi network.
  • The app icons keep on bouncing for a certain period of time after startup.
  • Your Mac runs slow, especially when under a low CPU load.
  • Your Mac shuts down slowly.
  • Your Mac won’t boot.

How to Reset Your Mac’s SMC

There are ways to reset your Mac’s SMC, but that depends on what type or model of Mac you’ve got. For instance, the way to reset the SMC of a MacBook Pro is completely different from the way to reset the SMC of an iMac.

Reset the SMC of a MacBook

If you’ve got a MacBook that has an Apple T2 security chip, here’s how to reset the SMC:

  1. Shut down your Mac.
  2. Press and hold the Power button for about 10 seconds and then restart.
  3. If you are having problems upon startup, switch off your Mac again.
  4. Press and hold the Power button, the right Shift key, the left Control key, and the left Option key for a couple of seconds.
  5. Release all the keys and wait a couple more seconds.
  6. Restart your MacBook.

To reset the SMC of a MacBook with a battery that is non-removable, follow these steps:

  1. Shut down your MacBook.
  2. Press and hold the left Option, Control, and Shift keys while pressing the Power button for about 10 seconds.
  3. Release all the keys and wait for a few seconds.
  4. Switch on your MacBook.

To reset the SMC of a MacBook that had been released before 2015, here’s what you should do:

  1. Shut down your MacBook.
  2. Take out the battery.
  3. For 15 to 20 seconds, press and hold the Power
  4. Put back the battery again and switch on your MacBook.

To reset the SMC of an iMac Pro, follow these steps:

  1. Switch off your iMac.
  2. For 15 to 20 seconds, press and hold the Power
  3. Release the Power button and wait for a couple of seconds.
  4. Restart your iMac.
  5. If you encounter problems, switch off your iMac.
  6. Unplug the power cord and wait for 15 to 20 seconds.
  7. Reconnect the power cord again.
  8. Switch on your Mac.

To reset an older desktop Mac version, here’s what you should do:

  1. Switch off your Mac.
  2. Unplug the power cord and wait for 15 to 20 seconds.
  3. Reconnect the power cord again.
  4. Switch on your Mac.

Now that you know how to reset the SMC of your Mac, let’s proceed with getting to know what a PRAM and an NVRAM are.

What Are PRAMs and NVRAMs?

Parameter Random Access Memory (PRAM) and Non-Volatile Random Access Memory (NVRAM) are the components of your Mac that hold your Mac’s data configuration, such as the date and time settings, as well as the mouse, volume, desktop, and other important control settings. These areas of your Mac’s memory are powered by a tiny battery so data won’t get lost whenever you shut down your Mac.

While the modern Intel-based Macs have NVRAMs, the older Mac models have PRAMs. So, don’t be confused why some Mac users refer to PRAM when what they actually meant is the NVRAM. It does not really matter because both components do the same function. Also, you can reset them the same way.


So, when is a PRAM or NVRAM reset required?

When to Reset the PRAM or NVRAM of a Mac

Restart smc macbook pro 2011

In most cases, the problems associated with the NVRAM or PRAM are software-related; perhaps your computer has forgotten certain settings or it has encountered connectivity issues. Aside from that, here are other signs to look out for to find out if a PRAM or NVRAM reset is required:

  • The volume does not work properly.
  • You can notice a strange clicking speed and mouse scrolling.
  • The keyboard does not respond normally.
  • The clock and the time zone are not correct.
  • The display resolution cannot be changed.
  • Your Mac shuts down slowly.

How to Reset the NVRAM or PRAM of a Mac

You need not know whether your Mac has a PRAM or an NVRAM because the reset process for both is the same. Here’s how to perform it:

  1. Switch off your Mac.
  2. Press the Power
  3. Before you reach the grey screen, press the R, P, Command, and Option keys together. Hold them down until your Mac restarts and the startup sound is heard.
  4. Release the keys.

After you reset the PRAM or NVRAM, you will notice that some of your Mac’s settings are lost, including the keyboard preferences, as well as the volume, mouse, and time settings. If you remember your previous settings, then you should be able to restore them in a few minutes.

Important Notes

Although it isn’t necessary to reset your Mac’s SMC, NVRAM, or PRAM, it is still good to know what these components do and how to fix issues that you encounter.

Just so you avoid encountering more errors, it is best that you download and install Outbyte Mac Repair. Though it is not a miracle cure for all Mac problems, it does a pretty great job at optimizing your Mac and ensuring it performs at its best all the time.

Do you know other ways to reset your Mac’s PRAM, NVRAM, or SMC? Let us know in the comments section below.

If you’re running into errors and your system is suspiciously slow, your computer needs some maintenance work. Download Outbyte PC Repair for Windows, Outbyte Antivirus for Windows, or Outbyte MacRepair for macOS to resolve common computer performance issues.Fix computer troubles by downloading the compatible tool for your device.
See more information about Outbyte and uninstall instructions. Please review EULA and Privacy Policy.

SMC stands for system management controller. When you face problems with your Mac and restarting does not solve it, you can reset the SMC. This can fix issues related to power, thermal, fans, charging, keyboard backlighting, battery, and more. The process depends on which type and model of Mac you have. Before learning how to reset SMC on any Mac, let us understand why you might want to do it.

Note: This guide is for Intel-based Macs. If you have an M1 Mac, this is not applicable for you because SMC isn’t available on it.

To know if your Mac has an Intel processor or Apple chip, click the Apple logo at the top left and choose About This Mac.

What is SMC responsible for on the Mac?

SMC takes care of several things, including actions that happen even when the Mac is off — for example, pressing the power button or the orange light when you connect the Mag Safe charger to your MacBook. Courtesy of official Apple Support, here is the list of actions SMC is responsible for.

  • Power, in the power button and USB ports.
  • Battery and charging.
  • Internal fans and other thermal-management features.
  • Indicators such as status indicator lights (sleep status, battery charging status, and others).
  • Sensors such as the sudden motion sensor, the ambient light sensor, and keyboard backlighting.
  • Behavior when opening and closing the lid of a MacBook.
  • Selecting an external (instead of internal) video source for some iMac displays.

How to know that you need to reset Mac’s SMC

If you have problems related to any of the features mentioned above, resetting SMC will help. For example:

  • The keyboard backlight does not work correctly.
  • The light on the MagSafe charger does not behave properly.
  • Battery indicator lights (on the left side) on earlier MacBooks do not represent the right status.
  • Mac’s fan kicks in at full speeds even when there is no heavy use.
  • Screen brightness and keyboard backlight do not respond automatically to ambient light.
  • Mac’s power button is unresponsive.
  • You have issues while closing or opening the MacBook lid.
  • MacBook fails to charge.
  • Mac fails to recognize externally connected devices.
  • Random and unexpected shutdowns.
  • Unwarranted problems with target display mode.

If you face the problems mentioned above, resetting Mac’s SMC will help. Let’s check out how to do it.

Restart Smc Macbook Pro 2012

  • How to reset the SMC on your Mac

How to reset the SMC on your Mac

The steps are not the same for all Mac computers. Thus, it is essential to know about your Mac and follow the steps accordingly.

Reset the SMC on MacBook with the T2 chip

Recent Mac desktops and notebooks (notably 2018 and later) have Apple T2 Security Chip responsible for encrypted storage, secure boot, enhanced image signal processing, and security for MacBook’s Touch ID data.

Here is how to know if your Mac has the T2 chip or not.

  1. Click the Apple logoAbout This MacSystem Report.
  2. Select Hardware from the left sidebar and click Controller.
  3. If your Mac has the T2 chip, it will be mentioned here.

Once you have identified that your MacBook has the T2 chip, here is how to reset the SMC.

  1. Click the Apple logo and Shut Down your MacBook.
  2. On the in-built keyboard, press and hold control + option + shift for 7 seconds.
    Important notes: Press control and option from the keyboard’s left side and shift from the right side. (see image). It is okay if your MacBook turns on.
  3. After holding the above three keys for 7 seconds, press and hold the power button too. So now, you are pressing and holding a total of 4 keys.
    Note: Your Mac will turn off if it was on.
  4. Continue holding all the four keys for 7 seconds and then leave them.
  5. After a few seconds, press the power button to start your MacBook.

How to reset SMC on MacBook without the T2 chip

If your MacBook does not have a T2 chip, the steps to reset SMC varies depending on what kind of battery it has – non-removable or removable battery.

  • MacBook with non-removable battery: MacBook Pro (mid-2009 through 2017), MacBook Air (2017 or earlier), other MacBook models except MacBook (13-inch, Mid 2009).
  • MacBook with removable battery: All MacBook models of early 2009 or earlier. Plus, MacBook (13-inch, Mid 2009).
  • To know your MacBook’s year, click the Apple logoAbout This Mac.

Reset SMC on MacBook with a non-removable battery:

  1. Click the Apple logo and Shut Down your MacBook.
  2. From the left side of the in-built keyboard, press and hold shift + control + option. (see image)
  3. Keep holding these three keys, and now also press and hold the power button.
  4. Continue holding all four keys for 10 seconds and then leave them.
  5. Finally, press the power button to start your MacBook.

Reset SMC on MacBook with a removable battery:

  1. Click the Apple logo and Shut Down your MacBook.
  2. Carefully remove the internal battery. (See YouTube videos or take help from Apple Support, if needed.)
  3. Press and hold the power button for 5 seconds.
  4. Insert the battery again and press the power button to start the Mac.

Reset Smc Macbook Pro Apple

Reset SMC on Mac desktop computers with or without T2 chip

The process to reset SMC on iMac, iMac Pro, Mac Pro, Mac mini, etc., is the same.

  1. Click the Apple logo and choose Shut Down.
  2. Completely unplug the main power cord.
  3. Wait for 15 seconds and re-plug the power cord.
  4. Wait for 5 seconds and press the power button to start the Mac.

Note: Since there is no confirmation popup or message, there is no concrete way to tell if the SMC reset was successful. However, if the problems mentioned earlier no longer exist, you can derive that it was successful.


Restart Smc Macbook Pro 2011

A few people also suggested that after SMC reset, the time & date on your Mac may be slightly altered. The changed energy saver settings in System Preferences might also be restored to default.

Reset Smc Macbook Pro

I hope this guide helped you fix the issue, and now you have an improved Mac experience. If you have any questions, please reach me via the comments section.

You will also find these helpful: