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This article shows you how to reset your MacBook Pro’s NVRAM and battery settings, as well as how to erase all data on your MacBook Pro and restore it to factory settings. Resetting your Mac’s NVRAM can help fix battery display errors, and battery settings can be reset when your Mac often gets hot or hangs. Restoring your MacBook Pro to factory settings will erase all data on the hard drive and reinstall the operating system.
Steps
Reset NVRAM
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Find out what errors can be fixed by resetting NVRAM. NVRAM stands for “Non-Vpatile Random-Access Memory” – stores settings such as speaker volume, default display, and other settings that the computer Mac is commonly used. Resetting the NVRAM can fix no sound, screen flickering or shutdown, slow boot time, and similar issues with your MacBook Pro.
- On some Macs, “NVRAM” is replaced by “PRAM” (“Parameter Random-Access Memory”), which works similarly to NVRAM.
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Open the Apple menu 
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by clicking the Apple icon in the upper left corner of the screen. You will see a screen showing a selection list.
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Click Shut Down… at the bottom of the Apple menu.
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Click Shut Down when asked to turn off the MacBook Pro.
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Find the NVRAM reset key. To reset the NVRAM, you will have to press the ⌘ Command , ⌥ Option , P and R keys at the same time for about 15 seconds.
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Open your Mac. Press the “Power” button
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(Source) on the Mac to start it up.
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Press and hold the NVRAM reset key combination. Do this right after pressing your Mac’s “Power” button; you will need to press 4 keys at the same time before the Apple logo appears.
- If the Apple logo appears before you press the key combination, you will have to turn off the device and try again.
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Continue holding down the key combination until the Mac has finished booting. Your Mac will restart on its own during this process. When you see the user selection screen, stop pressing the keystrokes and sign in to your MacBook Pro as usual.
- You will need to reset some preferences (such as favorite audio output) after the NVRAM reset.
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Check if the problem is fixed or not. If you’re still having problems with your system setup, you’ll need to restore your MacBook Pro to factory settings. However, this will erase all data stored on the device.
Reset battery
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Learn what errors can be fixed with a battery reset. To reset the battery, you really need to reset the SMC (System Management Controller) – a small chip used to control the display lights, button response, and battery management . Resetting the SMC can extend battery life, fix overheating, and improve the speed of your MacBook Pro. [1] X Research Source
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Check for signs. Here are a few signs that are directly related to SMC:
- The fan makes noise and runs at high speed even when the computer is not hot and is placed in a cool place.
- Indicator lights (battery, display, etc.) are not working correctly.
- MacBook does not respond when pressing the power button.
- The computer turns itself off or goes to sleep while in use.
- The battery is not charged properly.
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Open the Apple menu
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by clicking the Apple icon in the upper left corner of the screen. You will see a screen showing a selection list.
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Click Shut Down… at the bottom of the menu.
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Click Shut Down when asked to turn off the MacBook Pro.
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Connect your MacBook Pro to a power source. You’ll attach one end of the charging cord to the outlet first, and then attach the other end to the charging port on the right side of the MacBook Pro.
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Find the SMC reset key combination. To reset the SMC, you need to press the key combination ⌘ Command , ⌥ Option , ⇧ Shift and the “Power” button.
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(Source) at the same time.
- If your MacBook Pro has a trackpad, the “Power” button is also the Touch ID button.
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Press and hold the SMC reset key combination for about 10 seconds and then release.
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Press the “Power” button. Here’s how to turn on your Mac to restart. The battery-related issue should be fixed once the Mac restart is complete.
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Check if the problem is fixed or not. If you’re still having problems with the battery, you’ll need to restore your MacBook Pro to factory settings. However, this will erase all data stored on the device.
Restore original settings
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Back up your Mac if possible. Since restoring your Mac to factory settings will erase all data on the hard drive, you’re better off backing up important data before proceeding.
- If you can’t sign in to your Mac or can’t run the Mac’s Time Machine program, skip this step.
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Open the Apple menu
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by clicking the Apple icon in the upper left corner of the screen. You will see a screen showing a selection list.
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Click Restart… near the bottom of the menu.
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Click Restart when asked to restart your Mac.
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Press the ⌘ Command and R keys at the same time. You will need to do this right after clicking Restart .
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Stop pressing the key combination when you see the Apple logo. The MacBook will start booting to open the Recovery window. This process may take several minutes.
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Select Disk Utility in the middle of the Recovery window.
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Click the Continue button in the lower-right corner of the window to open the Disk Utility window.
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Select your Mac’s hard drive by clicking the hard drive’s name in the upper-left corner of the Disk Utility window.
- Your Mac’s hard drive is called “Macintosh HD” if you haven’t renamed it.
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Click the Erase tab at the top of the Disk Utility window. The screen will display a new window.
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Click the “Format” drop-down box to see a selection list.
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Click Mac OS Extended (Journaled) in the selection list.
- This is the basic disk format used for Mac hard drives.
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Click the Erase button in the lower-right corner of the window to erase the data on your Mac’s hard drive.
- Deleting data can take several hours, so you’ll need to connect your Mac to a power source.
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Click Done when prompted. At this point, the process of deleting Mac data is complete.
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Click the Disk Utility menu in the upper-left corner of the screen to open the drop-down menu.
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Click the Quit Disk Utility option at the bottom of the menu to return to the Recovery window.
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Select Reinstall macOS (Reinstall macOS) in the Recovery window.
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Click the Continue option in the lower right corner of the window to start downloading MacOS to your computer.
- You must have an Internet connection to download MacOS to your computer.
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Follow the instructions on the screen. Once the MacOS download is complete, you can install and set up the operating system as you did when you first bought your Mac.
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This article shows you how to reset your MacBook Pro’s NVRAM and battery settings, as well as how to erase all data on your MacBook Pro and restore it to factory settings. Resetting your Mac’s NVRAM can help fix battery display errors, and battery settings can be reset when your Mac often gets hot or hangs. Restoring your MacBook Pro to factory settings will erase all data on the hard drive and reinstall the operating system.
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