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Retina display is a high definition display...

When I heard a coworker saying that Apple's relied solely on GPU's for it's resolution I was kind of expecting for him to be joking, since he does know about computers.

Yet, he really didn't know that the GPU was only part of the game. It seems that he doesn't know that the display also plays a major role for the the high definition that Apple's computers support. Not only that, he was at a lost on the fact that support for such high definition could be implemented on GNU/Linux and Windows.

The key part is that the ability to run high definition is not only based on hardware, you also need the software to support it. If the OS you run doesn't have the implementation to run high definition, you won't get it no matter how many GPU's you have nor the fact that you have a display that supports it.

The fact that Mac OS X looks the way it does has to do with the fact that the display supports the high pixel density needed. It helps to have a GPU to help run the show, but you still need the high definition display to be able to run have that level of resolution.

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