Night mode is an automatic setting which takes advantage of the new wide-angle camera that's in the iPhone 11 and 11 Pro models. It's equipped with a larger sensor that is able to let in more light, allowing for brighter photos when the light is low.
macOS Catalina Now Available
Apple Releases Graphics Firmware Update for 17" Unibody MacBook Pro
This firmware update is recommended for all 17-inch MacBook Pro (Early 2009) users and addresses the appearance of vertical lines or distorted graphics on the notebook display.Apple's support document provides instructions on how to install the update and determine whether it successfully installs. The download weighs in at 770 KB.
Numerous users have reported in Apple's discussion forums and elsewhere problems with lines and distortion on the new models, and this update appears to be intended to address these issues.