Given the fact that Apple is still putting 3+ year old processor technology in their newest notebooks it should come as no surprise to anyone that they have no plans to incorporate USB 3 support into their products at this time.
In one of his famous email replies, Steve Jobs had this to say about it:
We don’t see USB 3 taking off at this time. No support from Intel, for example.
Catch 22, they don’t see it taking off, yet they’re not doing anything to help it along.
While it leaves the door open for future implementation, it does seem to put some blame on Intel. It’s true, that Intel doesn’t support USB 3 in their native chipsets. However, it should be pointed out that their friends over at AMD… do.
via 9to5mac