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imac retina 5k 27" default scaled 5120 2880

  1. M

    Display question

    I have a 5k late 2015 The default for display seems to be running at 3840 x 2160 if the screenshot is to be believed. Isn't Retina meant to be 5120×2880? Or is that what it looks like on default on a 27" screen? Am I missing something?