Resetting PRAM or NVRAM might just fix your boot failure. PRAM (parameter random-access memory) or NVRAM (non-volatile random-access memory) is a small amount of your computer’s memory that stores certain settings in a location that macOS can access. This includes settings like your Mac’s speaker volume, screen resolution, startup disk selection, and any recent kernel panic information.
If you experience issues related to these features, resetting PRAM or NVRAM might help.
How to reset NVRAM
- Shut down your Mac
- Find Command (⌘), Option, P, and R on your keyboard
- Turn on your Mac
- Press and hold the Command-Option-P-R keys immediately after you hear the startup sound
- Hold these keys until the computer restarts, and you hear the startup sound for the second time
- Release the keys
If you have a late-2016 MacBook Pro, the steps are slightly different
How to reset NVRAM on late-2016 MacBook Pro models
- Shut down your Mac
- Find Command (⌘), Option, P, and R on your keyboard
- Turn on your Mac
- Press and hold the Command-Option-P-R keys immediately after you turn on your Mac
- Hold these keys down for at least 20 seconds to ensure that your Mac completes the process correctly
- Release the keys
After resetting NVRAM, you might need to reconfigure settings for speaker volume, screen resolution, startup disk selection, and time zone information.
Semoga tips ini dapat membantu anda.
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