Presumably the same attack works on the iMac and mini as well, since they both use the same Atheros part, and the same driver.More likely: it doesn't. In the presentation, Maynor uses a "third-party wireless card". It looks like a ExpressCard/34 802.11 card, but the non-'Pro' Macbook doesn't have Express Card slots, and the card they hold is too big to be a USB device, yet the Macbook they use is definitely black. Something is already smells like day-old fish.
If Apple "leaned on him" then why in the world would they still allow him to demonstrate the exploit at all?
He never did demonstrate the vulnerability [at blackhat] with the Mac wireless card. Instead, he used a third party card, all the while hinting at the fact that there was "more to it" than that.
Your reading comprehension needs work.