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.
16" MacBook Pro Now Available
Apple Says Aperture Won't Run in Future macOS Versions After Mojave
Apple ceased development of Aperture in June 2014 and removed the software from the Mac App Store in April 2015 after the launch of the Photos app for Mac. However, the application continues to function on macOS Mojave for users who still have it installed, albeit with some performance limitations.
As part of the transition from 32-bit to 64-bit, certain media files created using older formats or codecs will also be incompatible with future versions of macOS after macOS Mojave. Apple has shared instructions on how to convert incompatible media in iMovie libraries and Final Cut Pro X and Motion projects.