protected function setAppleConfig(array $config, $os)
    {
        $supportedAppleOS = array("mac", "ios");
        //Check if the OS is supported
        if (!in_array($os, $supportedAppleOS, true)) {
            throw new \RuntimeException(sprintf('This Apple OS "%s" is not supported', $os));
        }

        $pemFile = null;
        if (isset($config[$os]["pem"])) {
            // If PEM is set, it must be a real file
            if (realpath($config[$os]["pem"])) {
                // Absolute path
                $pemFile = $config[$os]["pem"];
            } elseif (realpath($this->kernelRootDir.DIRECTORY_SEPARATOR.$config[$os]["pem"]) ) {
                // Relative path
                $pemFile = $this->kernelRootDir.DIRECTORY_SEPARATOR.$config[$os]["pem"];
            } else {
                // path isn't valid
                throw new \RuntimeException(sprintf('Pem file "%s" not found.', $config[$os]["pem"]));
            }
        }

        if ($config[$os]['json_unescaped_unicode']) {
            // Not support JSON_UNESCAPED_UNICODE option
            if (!version_compare(PHP_VERSION, '5.4.0', '>=')) {
                throw new \LogicException(sprintf(
                    'Can\'t use JSON_UNESCAPED_UNICODE option. This option can use only PHP Version >= 5.4.0. Your version: %s',
                    PHP_VERSION
                ));
            }
        }

        $this->container->setParameter(sprintf('rms_push_notifications.%s.enabled', $os), true);
        $this->container->setParameter(sprintf('rms_push_notifications.%s.timeout', $os), $config[$os]["timeout"]);
        $this->container->setParameter(sprintf('rms_push_notifications.%s.sandbox', $os), $config[$os]["sandbox"]);
        $this->container->setParameter(sprintf('rms_push_notifications.%s.pem', $os), $pemFile);
        $this->container->setParameter(sprintf('rms_push_notifications.%s.passphrase', $os), $config[$os]["passphrase"]);
        $this->container->setParameter(sprintf('rms_push_notifications.%s.json_unescaped_unicode', $os), (bool) $config[$os]['json_unescaped_unicode']);
    }