3 METHODS FOR BYPASSING APPLE EFI FIRMWARE PASSWORD / ICLOUD LOCK (Guest Post from Robert Bryant)
Robert Bryant First off I’d like to say that none of this information is intended for illicit activity. This guide is simply to help those who have locked themselves out of their Mac, or have purchased a Mac from someone who did not give them the password. The initial method of hacking EFI Firmware / iCloud Locked Macs is with a device called the Teensy. This device costs about $30 on eBay and plugs into the USB port on your mac. The Teensy works by brute force attacking the 4 digit pin code, trying every combination of 4 digits. Apple circumvented this by enabling a 6 digit code. Later revisions of the Teensy now cost more and also do 6 digit brute force attacks. The real hitch I ran into with the Teensy is that it only works to unlock iCloud locked Macs. If you have a locked EFI Firmware Password, and can not boot into the iCloud login, for all intents and purposes you are yet again stuck. The final two methods require a lot more technical proficiency, but have both work...