What? Why on earth would you think that? As others have said, it's the icons in finder. "Hacking the filesystem" makes it sound more drastic than it is, they

What? Why on earth would you think that? As others have said, it's the icons in finder. "Hacking the filesystem" makes it sound more drastic than it is, they have worked out how to bend the extensive HFS+ metadata system to their will. They are not monkeying around with the storage of the actual data, that would be crazy.