The shipping date for the high-end version of the Retina MacBook Pro with 15-inch display has apparently been increasing for a while now. According to MacRumors, the shipping date moved from the usual time frame of one week to two weeks, and then, from two weeks it has now reportedly moved to three weeks duration. Needless to say, this news has triggered the rumor about a new or refreshed 15-inch Retina MacBook Pro release.

It is worth noting that the annual Worldwide Developers Conference (WWDC 2015) has been scheduled for June. This is where Apple is expected to introduce its new devices for 2015. But then, the release of any new device will apparently depend on the Broadwell chip availability. Therefore, in the case things go as planned, Apple might introduce a refreshed version of the 15-inch Retina MacBook Pro, opines MacRumors.

As such, there’s not much information available to ascertain the Broadwell chips' availability. However, a road map from the summer of 2014 picked up by MacRumors reportedly points to the availability of the chip specific to notebooks in July or August 2015. On the other hand, WCCF Tech says, Intel has reportedly started shipping a limited quantity of Broadwell chips for desktops. But the chips required for the 15-inch Retina MacBook Pro are seemingly not available at this point.

In the meantime, the release date of the Broadwell chips for desktops has been reportedly set for July or August. This means the Broadwell chips would replace the mighty current-generation Crystalwell chips housed in the 2014 Retina MacBook Pro versions. In the event these chips ship prior to the planned timeline of July or August 2015, there’s apparently a possibility that Apple might introduce the 15-inch Retina MacBook Pro at the WWDC 2015 event.

Meanwhile, there’s also a possibility that the shipping delays specific to the 15-inch Retina MacBook Pro could also be due to workers' reallocation. Furthermore, MacRumors say, Apple suppliers responsible for manufacturing the Retina MacBook Pro are also responsible for the Apple Watch and MacBook 2015 production. Therefore, the delays could also be because of resources tasked to work on critical products rather than the high-end Retina MacBook Pro with relatively less demand. Nonetheless, readers should note that Apple has not confirmed the existence of such a refreshed version of its notebook thus far.

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