Chosen Solution
Hi all. My MacBook’s firmware password from three owners ago has recently activated itself again. I’m unable to get support from Apple, since I don’t have the original purchase receipt, and my research has shown me that if I replace the firmware bios chip on the logic board (with a new serial number) the problem will go away forever. Before I do that repair I have some questions that hopefully more knowledgable folks like you might confirm, answer, or clarify before I make some purchases and execute the repair. Is this the correct part (https://www.ebay.com/itm/BIOS-EFI-Firmwa…) I need to purchase and replace? (The model, A1466, and logic board, EMC 2925, appear to match.)This video (https://youtu.be/D4kqC2MaQjg) appears to have pretty thorough instructions on how to execute the repair; would anyone with experience be able to confirm this is good video?Although I’m fully comfortable removing and reinstalling the logic board and all the internal components needed to get to the chip, I have never soldered anything before. Is this a repair someone with zero soldering experience should attempt? Also, let me know if there’s anything else I’m missing that I should know. Many thanks!
Someone had to physically have access to the system to apply it. You may want to see who had access to the system as they know what it is. Otherwise you’ll need to edit the firmware resetting it. I wouldn’t replace the chip as they invites other problems.
