MacBook : There are a few things you can attempt to determine the issue:
Guarantee that you are composing the right secret phrase: Ensure you are not making any grammatical errors while composing the secret phrase.
Restart your MacBook Air: Take a stab at restarting your MacBook Air and afterward entering the secret word once more.
Reset the SMC: You can take a stab at resetting the Framework The board Regulator (SMC) on your MacBook Air. Here are the moves toward follow:
a. Close down your MacBook Air.
b. Interface the power connector to your MacBook Air.
c. Hold down the Shift + Control + Choice keys and the power button simultaneously for a couple of moments.
d. Discharge all the keys and power button simultaneously.
e. Press the power button to switch on your MacBook Air.
Reset the secret key utilizing Mac ID: Assuming that you have connected your Mac ID with your MacBook Air, you can take a stab at resetting the secret key utilizing your Mac ID. Here are the moves toward follow:
a. Click on the “?” symbol on the login screen.
b. Enter your Apple ID email address and secret word.
c. Adhere to the on-screen directions to reset your secret word.
Reset your login password using a recovery key:
If you turned on FileVault encryption and created a recovery key, you can use the recovery key to reset your login password.
Click the question mark next to the password field.
If you don’t see a question mark , press and hold the power button until your Mac shuts down, then press the power button to restart your Mac.
Click the arrow next to “reset it using your recovery key”.
If you don’t see an arrow , see the Apple Support article If you can’t reset your Mac login password.
Enter the recovery key, then click Next.
Follow the instructions to reset your login password.