It plugs right into a port on the motherboard and it is awesome. I found a company in the Netherlands that make a small circuit board with the preprogramed bios chip on it. I replaced the one on the board and it worked fine for about a month then it failed and bricked the machine. I bought a bios chip from bios depot on eBay and fed him the serial number and info and he made me a new bios chip. I am working on a MacBook Pro mid 2014 that was bios locked. They will tell you it was set by someones personal icloud account, that would be an invasion of privacy. apple does not want to help you they want to sell more machines. why should they care when they are getting new machines. schools and companies get rid off large quantities when they upgrade and never remove the passwords. another scenario is of large companies giving them to employees who set the passwords and then get fired. another scenario is people really forget the passwords usually setting them one time and never using them again. most common are second hand buyers who do not even know that there is a efi lock or pin lock when they buy them until one morning they wake up and find it remotely locked. Just to give you some scenarios i have come across. I have been removing them for years via hardware reprogramming because many people have no where else to turn. I agree that only apple has access to remove the passwords.
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