Can Nightlight read files outside of the sandbox?

Of course, you want to be able to read FITS files from anywhere on your machine. Nightlight performs a Spotlight search when it starts and finds all of the FITS files on your computer, but this doesn’t give it permission to read them. You must explicitly grant permission to read files that are not in Nightlight’s sandbox. Files it hasn’t received permission to read are marked with a red “no entry” badge. When you select the file, you will see a button to grant permission to read the file. Click it to open the file.