Some Apple computers have an extra layer of protection, a T2 security chip. A MacBook Pro and MacBook Air, released in 2018 and later, both come with the T2 chip. It secures the most critical macOS options, including Activation Lock, storage of encrypted data, secure boot, etc.
The T2 security chip controls the booting process and ensures that the MacBook Air (Pro) owner starts the system. And the owner can lock the computer in several ways.
Firstly, when a user enables the Find My Mac app on MacBook, this tool automatically sets on the Activation Lock screen when someone enters an incorrect Apple ID and password.
Secondly, users can enable EFI or the Extensible Firmware Interface password lock on MacBook with a T2 chip. This type of passcode protects a computer from untrusted firmware loads during startup.
Thirdly, users can turn on the iCloud System PIN Lock on MacBook. You enable this System Lock PIN when you turn on Find My and erase or report your MacBook Air (Pro) as lost through iCloud.
All these types of MacBook Lock will not go away if you do not know the correct password. Erasing, reactivating, restoring, recovering, rebooting the macOS device will not solve the problem. Only the CheckM8 software can unlock MacBook Pro and Air. It is a distant, fast, reliable, and straightforward solution you can find in the market today.