How to reset SMC on Mac

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Apple Finder iconTIP: Quickly fix stuck or unresponsive Mac

Did your Mac crash or is unresponsive? Is it slow or the fans are constantly on high speed? Or maybe LEDs or keyboard backlight does not work correctly?

No need to panic, your computer may not be damaged, just the SMC chip is stuck and we will show you how to fix it.

What is SMC

SMC stands for System Management Controller. It is critical low level subsystem included in Macintosh computers based on Intel processors.

SMC controls:

  • Thermal management (thermal activity, fan activity)
  • Power management (power consumption, battery charging, battery function)
  • Video mode switching
  • Sleep and wake up functionalities
  • Hibernation
  • LED indicators

SMC also includes macOS (OS X) End User License, used by operating system to identify original Apple hardware.

How the reset of SMC helps

Reset of SMC typically solves many hardware related problems such as:

Problems with Mac cooling fans and fan management: fans run constantly at high speed despite low CPU usage, fans not working, etc.

Problems with power management and battery: Computer isn't turning on. Sleep, wake up, hibernation functions aren't working. Battery isn't charging.

Problems with lightning management: keyboard backlight, display backlight, battery LED indicator working improperly.

Problems with video and external displays: display brightness, target video modes working improperly, external displays aren't working.

General performance problems: abnormally slow Mac without high CPU or disk usage, WiFi or Bluetooth working improperly, external ports not working, etc.

How to reset SMC of your Mac

The process of SMC reset is different for MacBook, MacBook Pro and MacBook Air with non-removable battery - MacBook, MacBook Pro with detachable battery and iMac, Mac Pro and Mac Mini.

How to reset SMC of MacBook, MacBook Pro and MacBook Air with non-removable battery

  1. Shutdown the MacBook
  2. Connect the power adapter to the MacBook
  3. Hold down the Shift+Control+Option keys and the Power button at the same time
  4. Release all keys and the power button at the same time (light on the MagSafe connector may change colors to indicate the SMC reset)
  5. Boot the Mac

macbook keyboard reset SMC shortcut

Reset SMC shortcut on MacBook keyboard

How to reset SMC of MacBook, MacBook Pro with detachable battery

  1. Shutdown the MacBook
  2. Remove the battery
  3. Disconnect the power adapter
  4. Hold the Power Key for 10 seconds
  5. Release the power key
  6. Reconnect your battery and power adapter
  7. Turn MacBook on

How to reset SMC of iMac, Mac Pro and Mac Mini

  1. Shut down the Mac
  2. Disconnect the power cord
  3. Press and hold the power button for 5 seconds
  4. Release the button
  5. Reattach the power cables
  6. Turn the Mac on

Related software and links:

Mac OS X icon

Mac OS X    Apple macOS / Mac OS X platform
Unix-based operating system for Apple Mac computers

 
macOS icon

macOS    Apple macOS / Mac OS X platform
A Unix-based desktop operating system for Apple Mac computers

 

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