Security by obscurity is working pretty well for Apple customers
Any reader of The Register should years ago have come to realize that no complex hardware or software product is hacker proof. There is no real security.
Apple, Linux, they've all got gaping holes.
The only shelter is keeping a low profile and using rare products and techniques -- this is what Apple users depend upon on a daily basis -- security by obscurity. And it works pretty good for them.
Obscurity isn't real security, there is no real security. Obscurity is just another flawed layer, like encryption, like sandboxes, like testing, like manual code examination. They're all flawed layers. They all leave holes.
The thing is to have so many layers, each with holes small enough, that it takes too much time and effort for a criminal or vandal or publicity seeker to reek havoc.