shasum -a 256 /path/to/restore.ipsw Compare to Apple’s published checksum (search "macOS Ventura 13.x IPSW SHA256" ).
https://updates.cdn-apple.com/2022FALLFULL/041-XXXXX-XXXXXXXX/InstallMacOSVentura.restore.ipsw : Exact build numbers change. To get current links, use MIST (macOS Installer Super Tool) or gibMacOS (open-source). Using gibMacOS (safe, community tool): macos ventura recovery image download
softwareupdate --fetch-full-installer --full-installer-version 13.6.7 The installer will be saved to /Applications/Install macOS Ventura.app . shasum -a 256 /path/to/restore