Released June 2012, Model A1278. Intel processor with Turbo Boost, Up to 512 MB DDR5 Video RAM

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My MacBook Pro got this message on screen saying System pin lock

Been using my macbook pro mid 2012 for almost two years. It was a gift. Woke up one morning to find sytem pin lock on screen and I don't recall putting any pin lock. How do I remove this. Thanks

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Are you sure no one had access to your system physically. If that is the case then your system was locked remotely via the internet.

I would go to your friend who gifted you this MBP and find out how they got it and if they have the receipt from the store/person it was bought from. With that in hand and with your friend you will need to visit an Apple Store to get the lock cleared.

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