Surely more than one is asking this same question and the truth is that it makes a lot of sense due to those little clues that always hide Apple in any corner to make you suspicious, sometimes correctly and sometimes just to mislead.
This is the case of a wallpaper appeared in OS X Mavericks and integrated by Apple with a resolution of 5120 x 2880 pixels, that is, higher than that represented in 4K mode, remaining at a modest 4096 × 2304 pixels if we compare it with that of the aforementioned background.
Of course, this does not mean that tomorrow or in a few months we will see an iMac or Thunderbolt Display in 27 ″ with resolutions as brutal as that of the discovered wallpaper, however always creates the doubt why it has been integrated with such a resolution.
The concrete wallpaper guilty of all this commotion is none other than the default wallpaper that the system integrates with that beautiful green and blue wave that Apple has chosen as the standard of the new system. If we think about it carefully, all retina resolutions have always doubled the pixel count from the standard version in the previous generation.
This is for example in the case of the 15 "Macbook Pro, which had a resolution of 1440 x 900 in its base version and which went up to 2880 x 1800 pixels in its subsequent redesign in Retina version or the iPhone case, going from 480 x 320 pixels to 960 x 640 being the last iPhone 5, a small adjustment of that resolution.
For this reason, the resolution chosen for this background is something to think about since currently the 27 ″ iMac and Thunderbolt Displays are located at 2560 x 1440 pixels and as I have already said, this wallpaper is just double. I don't know if there will be a Retina panel this year with the same resolution, but surely more than one surprise awaits us.
More information - OS X Mavericks: 'Do Not Disturb' for Notification Center
Source - cultofmac