Macbook Air model A1466 Efi unlock code

Greetings suddala144,

If you are wanting to remove a firmware password you have set on your Mac, follow the guidance found here:

Set a firmware password on your Mac - Apple Support

How to turn off a firmware password

Start up from macOS Recovery. During startup, you will be prompted to enter the firmware password.

When the utilities window appears, click Utilities in the menu bar, then choose Startup Security Utility or Firmware Password Utility.

Click Turn Off Firmware Password.

Enter the firmware password again when prompted.

Quit the utility, then choose Apple menu  > Restart.

If you forgot your firmware password

If you can't remember your firmware password, schedule an in-person service appointment with an Apple Store or Apple Authorized Service Provider. Bring your Mac to the appointment, and bring your original receipt or invoice as proof of purchase.

Take care.

Dustin_R_308 wrote:

If you forgot your firmware password

If you can't remember your firmware password, schedule an in-person service appointment with an Apple Store or Apple Authorized Service Provider. Bring your Mac to the appointment, and bring your original receipt or invoice as proof of purchase.

If this is the case, I would contact the store or AASP first to confirm exactly what will be acceptable proof of purchase. You will also need personal ID to match the receipt as well (again best to confirm ahead of time so you have exactly what Apple or the AASP requires).