EFI (Extensible Firmware Interface) is the part of the computer that holds the basic instructions to get the computer started, performing tasks like a self-test and the loading of the operating system.
A 4- or 6-digit PIN screen usually indicates that the computer was locked remotely using an iCloud account. After a certain number of incorrect tries to enter the PIN, the computer will become disabled for increasingly longer periods of time.
Our service will permanently remove the PIN lock, and re-enable the computer.
Your cost for this service is $69, and includes return shipping via Priority Mail. Additional computers in the same shipment cost $49.
Your cost goes down as your volume with us goes up over time.