https://wccftech.com/apple-killed-graykey-iphone-cracking/

Apple has apparently blocked the GrayKey tool, preventing it from cracking the password of any devices that are running its latest software. According to a report by Forbes, the iPhone maker has “put up what may be an insurmountable wall” for Grayshift, the maker of this iPhone hacking tool. Citing sources familiar with the case, the publication said that GrayKey can no longer crack the passcodes of iPhones running iOS 12 or above.

GrayKey took the industry by a storm earlier this year as a “cheap” tool to get into iPhones promising to unlock them for under $100 as compared to the millions of dollars the FBI reportedly pays for such unlocks. The device was specifically designed for the law enforcement to crack passwords on iPhones. Apple with the release of iOS 11.4.1 introduced the “USB Restricted Mode” to circumvent GrayKey’s tech. However, researchers were quick to point out ways around that fix too.