The firmware lock we're talking about is actually the motherboard password (hardware password), it can't be removed by reinstalling the system. When the MacBook screen is lit up, you will see the firmware lock interface. When the PIN code appears, restart the MacBook Air, and then hold down the ALT (Option) button before the screen lights up.
Accidentally set up a PIN code by manipulating the MacBook in a random manner The user set a PIN code on the MacBook, but the user forgot it MacBook ID password stolen，the other side can remote login through our ID, directly set a password to the MacBook, which is called the PIN code,
#Mac keychain access lock screen how to#
How to unlock PIN code lock and firmware lock on this MacBook Air?Īs we know, there are several reasons for forming a PIN code: Press the MacBook power button, after entering the system, it shows PIN code lock, press the "Option" button, it shows firmware lock. Guide: Unlock MacBook Air Firmware-lock and PIN-lock (A1466）Ī MacBook Air is locked by pin code and firmware, the model is A1466, the motherboard model is 820-00165-A, which is release in 2015.
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