Installers are signed, scripts piped from curl to ruby are not. Homebrew circumvents all the protections built into macOS (like Gatekeeper / Xprotect etc) for

Installers are signed, scripts piped from curl to ruby are not. Homebrew circumvents all the protections built into macOS (like Gatekeeper / Xprotect etc) for convenience. I don't think this method for distributing software has much of a future.