Hardware Apple Adds Support For External Retina Displays In Recent OS X Beta Apple just added external Retina display support in a recent beta of OS X Mavericks 10.9.3, According to 9to5mac. 4K monitors can now run the operating system at a pixel-doubled resolution, like on a Retina MacBook Pro. It could also be a sign that Apple is getting ready to release a long-anticipated external retina displ
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