He powered down the MacBook. He removed the bottom case, ten screws of varying lengths that he arranged on a magnetic mat like a bomb squad technician. Inside, the logic board was a miniature city of black chips, silver capacitors, and hair-thin traces. His breath fogged the shielding. He found a high-res board layout online and zoomed in. U4770. A tiny, black, eight-legged chip near the edge of the board, smaller than his pinky nail.
The aluminum chassis of the late-2019 MacBook Pro felt cold against Marco’s fingertips, a stark contrast to the hot dread pooling in his stomach. On the screen, a gray padlock icon sat motionless against a sterile white background. Above it, a single line of text: Enter EFI Password. unlock efi password
Marco stared at the phone. Then he powered down the MacBook, locked it in a drawer, and went to buy a safe. He powered down the MacBook
Marco looked at his soldering iron, gathering dust in a toolbox. He’d used it twice—once to fix a headphone jack, once to melt a plastic toy soldier to his desk. This was different. This was neurosurgery on a living machine. His breath fogged the shielding
On newer Macs (with Apple Silicon or the T2 Security Chip), this functionality is integrated into , but for many Intel-based Macs, the EFI password remains a primary line of hardware defense. 1. The Official Solution: Apple Support
Start up your Mac and immediately hold to enter macOS Recovery .
Technicians use proprietary tools to generate a one-time challenge code from your Mac, which allows them to reset the firmware.