Retina display: How to display images in native pixel resolution in Finder and Preview
<p>This is a pseudo question to share my own trick and script below.</p>

<p>The point is to be able to display image pixel for pixel on Retina displays. This is mainly useful for high resolution image and/or for developers working on HDPI version of images.</p>

<p>The solution works well <strong>only if the display setting is set to 2:1 ratio</strong> in the OS X preferences. Beware, late 2016 MacBook Pro default setting is not set to 2:1 by default. You should set it on the medium setting to get it right.</p>