Seller:nendell.r (4,666) 99.7%, Location: Port Reading, New Jersey, Ships to: Worldwide, Item: 253182951733 EFI iCloud Firmware SCBO Service Unlock for All Apple Macbook, iMac, Mac Pro from 2010 to 2017. Sold $159.99 Buy It Now or Best Offer, FREE Shipping, eBay Money Back Guarantee It's unique to the laptop being unlocked. Unless there is a keygen available, most modern implementations use a hashed value from the serial number or hard drive as the master unlock password. Um, this is how it works for PC firmware passwords as well. > with this feature, Apple HQ can give a service center the ability to clear a particular firmware password without giving them a universal backdoor (hardware or software). Most PC laptop manufacturers also disable changing the boot device or choosing a temporary boot device when a setup password is enabled. > because when a firmware password is set, a Mac requires the password to choose a different boot disk. It's so much easier to flash a backup than muck around with TFTP. Incidentally, I highly recommend investing in one of these if you're doing firmware development for routers. Maybe 5 minutes to disassemble the machine.Īs for hardware, you can flash SPI chips using a Teensy and a clip chip. As far as I know, you’ll need to take the machine apart to reflash it, plus special hardware
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