As part of its flurry of updates to Apple.com today, Apple's web team posted the new OS X Mavericks background image at 5120x2880. That resolution is identical to the one anticipated for a 27" Retina display for the iMac or a standalone Retina Thunderbolt Display. The image, which was noticed by Twitter user Marvin Scharle, is similar to Retina-sized images that were included in Lion in 2011, long before Apple had released any Retina-equipped Macs publicly.
