DigiTimes is reporting that Apple is working with component suppliers to start production of the new iMac by July end and an official launch around October. Aaron Lee posted in DigiTimes:

Apple's supply chain reportedly will start supplying components for the mass production of Apple's upcoming new iMac all-in-one PC in July with the device's official launch possibly around October, according to sources from upstream supply chain.

The sources also noted that Apple plans to expand Retina Display into all the product lines, meaning that the new iMac will have a high chance of featuring Retina Display; however, the rumors are not confirmed by Apple.

The sources pointed out that Apple is pushing Retina Display for its products in hoping to surpass its competitors in terms of screen resolution since most other notebook and tablet PC vendors are still adopting Full HD display for their products; however, since there are only limited contents that are capable of supporting Retina Display, while Retina Display is a lot expensive than a Full HD panel, most PC vendors currently still have no plan to follow suit and launch product with high resolution panel.

We have also heard similar plans for iMac launch. However, our sources say that Apple will start shipping the new iMac before Q3 2012. New iMac production ramp up will begin in August with manufacturing reaching full capacity by October end to meet holiday demand.