Download of MacBook Pro (Mid 2012) Software Update 1.0 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. This software for Mac OS X is an intellectual property of Apple Inc. The software lies within System Tools, more precisely General. We recommend checking the downloaded files with any free antivirus.
From the developer:
MacBook Pro (Mid 2012) Software Update is recommended for all users of mid-2012 MacBook Pro (Retina) models.
The update includes fixes that improve graphics stability, external display support, and USB 3 device support.
System Optimization
System Optimization