Macbook Pro (Retina, 13-inch, Late 2012): Subtle white lines may appear in Mission Control

Symptoms

When you use Mission Control on your Macbook Pro (Retina, 13-inch, Late 2012), you may notice a few fine lines appear on the desktop.

Example: 

 

Resolution

To resolve this issue, install the latest Mac OS X updates for your computer. See OS X: Updating OS X and Mac App Store apps for instructions.

This document will be updated as more information becomes available.
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