import Foundation #if os(macOS)import Darwinimport LocalAuthenticationimport Security enum KeychainNoUIQuery {    private static let uiFailPolicy = KeychainNoUIQuery.resolveUIFailPolicy()     static func apply(to query: inout [String: Any]) {        let context = LAContext()        context.interactionNotAllowed = true        query[kSecUseAuthenticationContext as String] = context         // Keep explicit UI-fail policy for legacy keychain behavior on macOS where        // `interactionNotAllowed` alone can still surface Allow/Deny prompts.        query[kSecUseAuthenticationUI as String] = self.uiFailPolicy as CFString    }     static func uiFailPolicyForTesting() -> String {        self.uiFailPolicy    }     private static func resolveUIFailPolicy() -> String {        // Resolve the Security symbol at runtime to preserve the true constant value        // without directly referencing deprecated API at compile time.        let securityPath = "/System/Library/Frameworks/Security.framework/Security"        guard let handle = dlopen(securityPath, RTLD_NOW) else {            return "u_AuthUIF"        }        defer { dlclose(handle) }         guard let symbol = dlsym(handle, "kSecUseAuthenticationUIFail") else {            return "u_AuthUIF"        }        let valuePointer = symbol.assumingMemoryBound(to: CFString?.self)        return (valuePointer.pointee as String?) ?? "u_AuthUIF"    }}#endif