Additional to the new version of OS X, Apple could also launch a 12-inch MacBook with a Retina display and a 27-inch iMac with a 4K resolution.

It is quite expected that OS X Yosemite will come out sometime before the holiday shopping season kicks off nearby in September-October. Even Apple has promised that it will release the final update soon.

A retina-display equipped MacBook Air has been in rumors for some time now. Apple has been rolling out retina-screened MacBook Pros for a few years now and its time for high-res Air.

However, news of an upcoming 4K display on the iMac has been scant, it seems predictable as professional users are looking for rig that can handle editing their 4K footage.

The report further adds that both the devices will be available in either Q3 or Q4, but issues with Intel chipsets could cause a few delays.