MacBook retina 2016

pkcable

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Jun 16, 2009
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There are more factors than the processing power of the computer. In fact perhaps more important is the speed of your wifi or cellular connection (your internet speed)
 

Rob Phillips

iPhone X & Apple TV Champion, Moderator
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May 1, 2012
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Barring outside factors, like the ones that @pkcable mentioned, the new MacBook should have zero issues playing 4K video.