When Apple released macOS Sierra in 2016 for their mac computers, they left some models out for certain features. One of those feature included Night Shift. Night Shift automatically shifts the colors of your display to the warmer end of the color spectrum after dark. This Installer was designed to replace the CoreBrightness framework allowing for all Macs to experience this helpful feature.
"Many Studies have shown that exposure to bright blue light in the evening can affect your circadian rhythms and make it harder to fall asleep. Night Shift uses your Macs clock and geolocation to determine when it's sunlight in your location, then it automatically shifts the colors in your display to the warmer end of the spectrum. In the morning, it returns the display to its regular settings. Pleasant dreams"