Standard AppSync builds are "Fat Binaries" (supporting arm64, arm64e, and armv7). However, between iOS 11 and iOS 14, developers released for specific chip sets (e.g., A12-A14 M1 exclusive). These DEB files contain patches optimized for Pacidaya or specific bootstraps like Procursus.

Some jailbreak tools (like Checkra1n or palera1n) have pre-installed stub versions of AppSync. Repositories often refuse to install due to "already installed" conflicts. Installing via using dpkg -i bypasses these front-end protections, allowing you to force-install the exclusive build.

Emulators and open-source tools not allowed on the App Store.

process to trick it into believing an invalid signature is actually valid. While often associated with piracy, its creator, Karen (angelXwind)

Ensure you are using the latest version of AppSync Unified. Older versions may not support new iOS versions.