Apple is reportedly continuing preparations for a Retina Display Mac with the recent release of Mac OS X Lion 10.7.4, reports AppleInsider.
Hidden within the OS X 10.7.4 update issued on Wednesday is a Retina-display-caliber icon for Apple's built-in TextEdit application. In OS X 10.7.3, the highest-quality version of the application's icon was 512-by-512 pixels, but after updating to 10.7.4, its resolution has been doubled. With the quality of the TextEdit icon increased greatly to 1,024-by-1,024 pixels, the file size of the icon also grew from just 209 kilobytes in OS X 10.7.3 to 1.7 megabytes in 10.7.4.
In December, DigiTimes reported that Apple may launch a new MacBook Pro with a 2880x1800 display resolution in the second quarter of 2012. In addition, Intel VP and GM of the PC Client Group Kirk Skaugen hinted that upcoming Macs could feature Retina Displays during a presentation at the Intel Developer Forum.