According to the report, the next generation of iMac will go launching with 5K resolution display screen and 27 inches in fourth quarter of this year.

And other details of this iMac haven't disclosed yet. iMac will also be one of the UHD resolution devices in the end of this year, Digitimes reported.

The price would be very high if iMac carries 5K resolution. The average price of devices, which go with 28 inches and super resolution, is $630, Digitimes added.

The biggest size of iMac is 27 inches with the 21.5 inches size of Led backlight panel. Actually, before launching the beta of OS X 10.10 Yosemite in July this year, Apple has exposed the retina display of iMac, which can go with the 6400*3600 resolution reaching to the standard of retina display.

The rumor of retina display of iMac lasts for few years. However, just MacBook Pro is configured with HD panel. And according to related media, Apple Inc. is researching and developing the MacBook Air of 12 inches with retina display.