Guide: Unlock MacBook Air Firmware-lock and PIN-lock (A1466）
A 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. Press the MacBook power button, after entering the system, it shows PIN code lock, press the 'Option' button, it shows firmware lock. How to unlock PIN code lock and firmware lock on this MacBook Air?
As we know, there are several reasons for forming a PIN code:
- 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,
- The user set a PIN code on the MacBook, but the user forgot it
- Accidentally set up a PIN code by manipulating the MacBook in a random manner
When the PIN code appears, restart the MacBook Air, and then hold down the ALT (Option) button before the screen lights up. When the MacBook screen is lit up, you will see the firmware lock interface.
The firmware lock we're talking about is actually the motherboard password (hardware password), it can't be removed by reinstalling the system. The password for the firmware lock is in the BIOS chip that exists on the MacBook motherboard. To unlock it, we need to read the data inside the BIOS chip, and then use proprietary software to remove the inside password, and then re-write information to the BIOS chip.
Because generally the BIOS chip is on the backside of the MacBook motherboard, it's complicated to remove it to read and write, so we can use special tool to read and write BIOS information without removing the MacBook motherboard.
Run ZXW Dongle, open the bit map to find the BIOS chip, find the connection point that's connected to the BIOS chip 8 Pin VCC, it should be under the motherboard.
Based on the MacBook bitmap, we know that the 1 Pin for R8133 is connected to the BIOS chip 8 Pin. Put MacBook motherboard under the microscope, connect the external BIOS chip to the power 3.3V to this resistor 1 Pin.
And then find SAM connector 1 Pin.
Find the SAM connector on the bitmap, the first pin for this connector is grounding, we can use digital multimeter to measure the first pin. Connect the corresponding interface, the other side connected to the programmer, external plus a BIOS chip power supply 3V-3.3V voltage.
The programmer will automatically recognize the BIOS chip model, and then read the information for the BIOS chip, and then save the original BIOS information. Open the special unlock software to remove the password for the BIOS information, and then re-write the information to the BIOS chip.
After successful writing, remove the unlock tool. Supply power to the MacBook Air, press the power button, and then hold on the Option, Command, R and P button at the button, which is to clean the BIOS. Release those buttons after the MacBook automatically restart.
Now the MacBook Air enters systems normally, press the Option button when booting, there is no lock, the MacBook Air has been unlocked.
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Reboot the Mac and hold down Command+R to enter recovery mode At the Utilities screen, go to the Utilities menu bar item and choose 'Firmware Password Utility' Select to turn the Firmware Password to OFF If this is successful it will tell you the firmware password is off. Reset password with Apple ID. If you have an Apple ID tied to your user account on Mac, you can use it to reset password from the login window. The option should be available by default. Otherwise, you can enable it in System Preferences Users & Groups Allows user to reset password using Apple ID.
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How to unlock your Apple ID
If you use two-factor authentication, you need a trusted device or trusted phone number to reset your Apple ID password and unlock your account. Mac office catalina. If you have a recovery key, you can also use it to help you regain access to your account.
Mac app store 10 6 4. If you see a message that says your account has been disabled in the App Store and iTunes Store, contact Apple Support for help.
If your Apple ID is locked for security reasons, you might see one of these alerts:
- 'This Apple ID has been disabled for security reasons'
- 'You can't sign in because your account was disabled for security reasons'
- 'This Apple ID has been locked for security reasons'
If your Apple ID is locked for security reasons, you might see one of these alerts:
- 'This Apple ID has been disabled for security reasons'
- 'You can't sign in because your account was disabled for security reasons'
- 'This Apple ID has been locked for security reasons'
If you can't unlock your Apple ID
How To Reset Mac Password When Forgot
If you use security questions with your Apple ID, or if you don't have access to a trusted device or phone number, go to iforgot.apple.com. Then you can unlock your account with your existing password or reset your password. Best external thunderbolt ssd for mac. After multiple unsuccessful attempts to unlock your account, your Apple ID will remain locked and you can try again the next day.
