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Replacing EFI chip to solve my forgotten EFI password?

I have a fresh harddrive i want to install because im using my original in my PC. But when i came to try and reinstall OSX by holding Option while booting, i remembered i have an EFI code and completely forgot it.

I went on EBAY and purchased a new EFI programmed chip that works with my model and it needs to be soldered on which im so-and-so experienced with but can get the job done correctly.

Will this work? Or will i have to ship the chip back?

Thanks for your replies!

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Why or how did your EFI chip get locked? Apple will gladly unlock it for you for free. All you have to do is show proof of purchase.

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Forgot the passcode. And the laptop is a handdown and the previous owner doesnt have any proof, so apple cant help in this situation

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Which raises a separate but related question: Exactly what does Apple require for them to consider you the new "owner" of the Mac?

Thank you, as I have a client that purchased a MBP from a person who is now incarcerated (no comments, pls). The Mac works; we just can't upgrade it due to the EFI lock.

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Buying a MacBook from an incarcerated person was your first mistake. What does the screen say?

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