This patch mostly contains fixes and optimizations that make navigating menus and playing the game on Controllers more efficient and smooth.
To install, unzip the file and open the associated "Just Keep Running.app" file. There might be possible issues related to launching JKR on Mac, mostly due to Apple's strict security methods when it comes to apps, but these can be bypassed using the terminal and some simple lines of code.
You can potentially do this using the help from the following Unity Thread: Forum.unity.com