Apple was briefly selling a 4K monitor from Sharp on the UK Apple Store over the weekend, before quickly removing the monitor from its website. The short-lived appearance of the 4K monitor hints that the new Mac Pro is very nearly here, but could also suggest that Apple wants to launch its own 4K monitor, too. 

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Sharp's PN-K321 4K Ultra HD LED monitor, which displays images at a 3840 x 2160 pixel resolution, was on sale for £3,499 through Apple's UK store from Friday to Sunday, before being removed completely.

The brief arrival of the monitor comes amid speculation that Apple is working on its own 4K display, as the company's new Mac Pro can support three of the high resolution screens, while the Retina MacBook Pro can support one. Currently, Apple only sells its Thunderbolt Display monitor, which displays images at 2560 x 1440 pixels.

Apple has already confirmed that it will be shipping the new Mac Pro this month, but we're still waiting for an exact release date for the high-end desktop. Some potential Mac Pro customers have voiced their concerns about the lack of a 4K display from Apple, but perhaps the Sharp leak will ease their worries, as it seems certain that Apple has something up its sleeve.

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