Apple was rumored to refresh MacBook Pro lineup of its laptops with Retina display update at WWDC 2012. However, the 15-inch model of MacBook Pro is the only ultrabook manufactured by Apple that received the Retina display update. Now the tech giant is reported to be working on 13-inch MacBook Pro with Retina display, which is scheduled to arrive in October this year.

KGI analysts Ming-Chi Kuo told Apple Insider on Thursday that Apple is planning to ramp-up the production of 13-inch MacBook Pro in September so that the ultrabook can see light of the day in early October. If you remember, Kuo was the first to claim that Apple will discontinue the 17-inch variant of MacBook Pro, along with indicating that Apple will sell 15-inch MacBook Pro with Retina display alongside the low-resolution 15-inch variant of MacBook Pro with thicker design.

Kuo's words turned out to be true at the Worldwide Developer Conference this week where the tech giant did the same. It is believed that Apple was planning to debut both the variants with Retina display at the WWDC show. However, the tech giant was not able to reveal the 13-inch MacBook Pro with Retina display at the June event due to manufacturing faults.

This reports also ties with NPD DisplaySearch's claim that 13.3-inch screen with display resolution of 2560 X 1600 pixels is already in Apple's plans since the first quarter of 2012.

"Our Q1 report also indicated that a 13.3" 2560 by 1600 resolution panel was being prepared for production in the third quarter. ODM supply chain sources indicate that Apple will use this panel in a MacBook Pro unit to be launched in the fourth quarter," said DisplaySearch analysts Richard Shim and Jeff Lin.

Apple's 15-inch MacBook Pro with Retina display is priced at $2,199. Presumably, the smaller variant will be less expensive. Apple is also expected to debut iPhone 5 with iOS 6 this fall. So we will not be surprised to see Apple showing off the two much-hyped Apple gadgets in the same event.