Press the Power (Eject) key to boot your MacBook Proģ. Press and hold down the SHIFT + Ctrl + Option (Alt) + Power (Eject) keys together for 10 secondsĤ. Unplug your MacBook Pro from the power supplyĢ. On a MacBook Pro without Removable Batteryġ. Here’s how you can reset SMC and NVRAM (PRAM) on your MacBook Pro: If any of these information gets corrupt, your MacBook Pro may fail to start properly or won’t start at all. NVRAM or PRAM (in older Mac computers) stores the information about system settings such as the startup disk to boot your Mac from, system date and time, screen resolution, etc. Reset Non-Volatile Random Access Memory (NVRAM) or Parameter Random Access Memory (PRAM).Resetting SMC ensures that any corrupt information it has is erased, and the configurations are set to default. System Management Controller is a hardware chip in your MacBook Pro that controls the power-operated components such as CPU fan, LEDs, etc. Reset System Management Controller (SMC).That said, if your MacBook Pro doesn’t boot, the two things that you can do are: However, by pressing a few keys on your un-booted MacBook Pro’s build-in keyboard, you can bring it back to life, and can re-configure its settings once it boots up. ![]() Since your MacBook Pro doesn’t start, there’s nothing much you can do from within the operating system to diagnose and fix the problem. It couldn’t recognize the correct startup disk to boot from, etc.Some issue with the power management system.Its battery couldn’t store enough power to start.Some of the reasons your MacBook Pro fails to boot include:
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