The same Bootcamp support page that either reveals an upcoming Mac mini refresh or a misprint also listed an iMac 27-inch mid-2014′ model before the page was updated – spotted by French site Consomac.
The model was listed above the 21.5-inch mid-2014 iMac released last month. That model was a low-end one, with a 1.4GHz dual-core i5 processor and 500GB hard drive. That might suggest a new entry-level 27-inch iMac is on the way – though Apple doesn’t generally offer a low-spec version of the larger iMac …
The current entry-level iMac 27 is a 3.2GHz quad-core i5 with a 1TB hard drive, a substantially better spec than the new 21.5-inch model. References to Retina iMacs were last month discovered in OS X Yosemite code.
As with the Mac mini, there’s no way to know whether these really are unannounced products, with the clock ticking on the ‘mid-year’ description, or simple errors on the page.