updated 12:57 pm EST, Thu January 30, 2014
Company presumably trying to avoid confusion with Geniuses
Apple has secured the rights to several ".guru" domains, registration checks show. Recently ICANN (the Internet Corporation for Assigned Names and Numbers) opened up a number of new top-level domains. Apple appears to have already acquired "apple.guru," "iphone.guru," "ipad.guru," and "mac.guru." A few other domains -- "appletv.guru," "macbook.guru," and "ipod.guru" -- are blocked from registration, most likely per request from Apple.
So far, Apple hasn't chosen to host anything at the new domains or even redirect them to its main website. The company is probably attempting to prevent URL squatting, which some site creators will do to scam and/or advertise to unwitting web users. Apple in particular has a long history of having to deal with squatters, especially for iPhone-related domains. It may be worried that ".guru" could be confused with the "Genius" term it uses to refer to its retail support technicians.
Some browsers with unified search/address bars, including Safari, are still unable to recognize the new domains. People who enter them without "http://" in front will instead be taken to search results.