eed this part to unlock your Macbook.
The EFI chip Free removal unlock tool can used to modify the serial number, recompose data of the ME module and clear PIN lock. No soldering, which means you don't need to teardown or remove the EFI chip.
How to use EFI Chip Free Removal Unlock Tool（2010 - 2017) - DS 809:
Get an EFI locked MacBook. Hold Power Button+Option Key to turn on the MacBook. The MacBook requires the EFI password to log in.Insert the USB flash drive storing system boo