Apple OS X El Capitan was released late yesterday evening beta 6. When announcing the release, we also informed you that the latest beta probably does not contain any significant news except for a few bug fixes. Server 9to5mac but now he informed that the latest beta OS X El Capitan contains more information about the speculated 21,5″ Retina iMac with 4K resolution. For the first time, information about the new iMac appeared in OS X El Capitan beta 2, but now there are more references to it Apple could really imagine.
FrancOuz server Consomac He found a file that contains information about the resolution of the 21,5″ iMac. The file states that the iMac should have a resolution of 4096×2304, thus offering a 4K display. The iMac icon in the file is still the same, which may indicate that the 21,5″ iMac will not undergo any changes in terms of design and will only offer a new Retina display. The file also reveals that it would Apple could introduce another iMac with Retina 5k display.
Updating the 21,5″ iMacs makes sense, and 4K resolution would be a great fit for the smaller iMac and sit handily alongside its larger 5K sibling. Also, the 21,5 iMac hasn't been updated since 2013, so it should Apple should update as soon as possible to provide them with new hardware including new processors and displays. According to the information in the file, the new 21,5″ Retina The 4K iMac will be sold with OS X El Capitan pre-installed, which suggests that it could be introduced either together with or shortly after the system's public release, which should take place this fall, around October.
*source: 9to5mac
Rather than another iMac 5K as suggested in the text Apple will introduce the 5K ThunderBolt Display.
Well, they're probably just waiting for Intel to release Thunderbolt 3 (USB-C port). No other cable supports 5k transmission as far as I know.
I was referring to the expected replacement of the antediluvian Thunderbolt Display.