We’ve added bootloader-level low-level extraction support for the second-generation Apple TV 4K. While the older 4K model was compatible with the checkm8 exploit, the second-generation is based on a newer SoC that required a newer exploit, usbliter8. The exploit requires a custom adapter that uses a microcontroller board with our custom firmware.

iOS Forensic Toolkit 10.11 adds bootloader-level extraction for the Apple Watch Series 4, the Apple Watch Series 5, and the second-generation Apple TV 4K. This article gives the full procedure for each of the two Apple Watch devices. The method uses usbliter8, an exploit of the SecureROM, the read-only boot code in the chip. checkm8 works on Apple chips up to the A11 generation, while usbliter8 works on the generation after it.