/**
 * useIsDarwin
 * ----------
 * @returns true  – if the browser is running on macOS / iOS
 *          false – otherwise (Windows, Linux, Android…)
 *
 * • Safe to call during server-side rendering: it defaults to `true`
 *   until it can really inspect the client.
 * • Uses the modern UA-Client-Hints platform field where available,
 *   then falls back to navigator.platform, then navigator.userAgent.
 */
export declare function useIsDarwin(defaultValue?: boolean): boolean;
