/**
 * A React Hook that determines if the current user's operating system is macOS.
 *
 * This is determined by checking the user agent string for the presence of 'Mac'.
 *
 * @return {boolean} A state value indicating whether the current user's operating system is macOS.
 *
 * @example
 * // returns true if the user's operating system is macOS
 * // returns false otherwise
 * const isMacOS = useIsMac();
 */
export declare const useIsMac: () => boolean;