The recently-released sixth developer beta (just today matched with a fourth public preview) has revealed listings for an as-yet-unreleased product listing, which could be an iMac -- and, according to the configuration files inside the beta, the forthcoming unit sports a "professional level" 4K resolution of 4096x304 -- slightly higher than "consumer 4K" resolutions of 3840x2160 found on most 4K HDTVs. The files refer only to resolution, and give no hints on display size or class of product.
