Download of MacBook Pro Retina EFI Update 1.3 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The program lies within System Tools, more precisely General.
From the developer:
This MacBook Pro Retina EFI Update update is recommended for MacBook Pro (Retina, 13-inch, late 2013) models. This update addresses an issue where the built-in keyboard and Multi-Touch trackpad may become unresponsive.
System Optimization
Device Assistants