img4tool

img4tool is a utility for manipulating IMG4, IM4M, and IM4P file formats, primarily used in the context of iOS firmware and boot processes. Notable features include the ability to print file contents, extract and create IMG4/IM4P/IM4M files, rename IM4P types, convert SHSH to IM4M, and verify signatures against a BuildManifest. This tool is essential for developers and researchers working with Apple's firmware files.