If you experience issues related to these settings or others, resetting NVRAM can help. The settings stored in NVRAM depend on your Mac and the devices you’re using with your Mac. Settings that can be stored in NVRAM include sound volume, display resolution, startup-disk selection, time zone, and recent kernel panic information. NVRAM (nonvolatile random-access memory) is a small amount of memory that your Mac uses to store certain settings and access them quickly. If you experience issues related to settings stored in NVRAM, resetting NVRAM can help. Press the power button again to turn on your Mac. If you have a 2016 MacBook Pro with Touch ID, the Touch ID button is also the power button.Ħ. Hold these keys and the power button for 10 seconds. Using the built-in keyboard, press Shift-Control-Option on the left side of the keyboard, then press the power button at the same time. Unplug the MagSafe or USB-C power adapter from your computer.ģ. Learn more about Mac notebook batteries.Ģ. Mac notebook computers that have a nonremovable battery include MacBook Pro (Early 2009) and later, all models of MacBook Air, MacBook (Late 2009), and MacBook (Retina, 12-inch, Early 2015) and later.
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