def umount(self, forced=True):
        """Try to unmount our mount point.

        Defaults to using forced method. If OS is Linux, it will not
        delete the mount point.

        Args:
            forced: Bool whether to force the unmount. Default is True.
        """
        if self.is_mounted():
            if is_osx():
                cmd = ["/usr/sbin/diskutil", "unmount",
                       self.connection["mount_point"]]
                if forced:
                    cmd.insert(2, "force")
                subprocess.check_call(cmd)
            else:
                cmd = ["umount", self.connection["mount_point"]]
                if forced:
                    cmd.insert(1, "-f")
                subprocess.check_call(cmd)
Try to unmount our mount point.

        Defaults to using forced method. If OS is Linux, it will not
        delete the mount point.

        Args:
            forced: Bool whether to force the unmount. Default is True.