Install the MacBook Pro Retina EFI Update 1.3. To find the update, open the App Store and click the Updates tab.
MacBook Pro (Retina, 13-inch, Late 2013): Keyboard and Multi-Touch trackpad may become unresponsive
Apple is aware of rare circumstances where the built-in keyboard and Multi-Touch trackpad may become unresponsive on 13-inch MacBook Pro with Retina display (Late 2013) computers.
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This document will be updated as more information becomes available.