Following the discovery of reference to new iMac models in OS X, Macbidouille has found code in the new OS X Yosemite developer preview that points to Retina resolutions for the yet to be announced product. Specifically, the file points to scaled resolution modes like those available for Retina MacBooks including, according to the report, 6400 x 3600 (probably a 3200×1800 HiDPI), 5760×3240 (2880×1620 HiDPI) 4096×2304 (2048×1152 HiDPI) resolutions. The report notes that the native resolution of the machine appears to be missing from the file as it only lists resolution of the various scaling modes.
Much like the Retina MacBook Pro with a native resolution of 2880 x 1800 is capable of scaling assets at 3840 x 2400 down to 1920 x 1200 and producing sharper, clearer images in the process, the report speculates the 6400 x 3600 resolution would be scaled down to 200×1800 HiDPI.
Apple has long been testing Retina resolution iMacs and rumors last year and earlier this year suggested the company could also release a new lower-cost iMac sometime this year. Apple last refreshed its iMac lineup in September of last year adding updated processors and more storage at the same price point with the same slim, redesigned exterior introduced in the previous generation. Apple’s current iMac lineup includes a 27-inch model with a resolution of 2560-by-1440 and a 21.5-inch model with a resolution of 1920-by-1080.