updated 09:19 am EST, Tue November 27, 2012
27-inch systems only shipping in December
Dispelling rumors, Apple has announced that the 2012 iMac will go on sale this Friday, November 30th. Initially, however, only the 21.5-inch model will be available. Orders for the 27-inch option will start shipping sometime next month.
The new iMac was originally announced in late October, without any firm release date. At one point rumors suggested that it wouldn't ship until 2013. The delay may be linked to the difficulty of building the computer, as its thin profile is dependent on unusual production techniques.