Mac OS plist files
I had to google it myself :)
The plist file (Property List) is an application settings XML file with the extension .plist. This format is good in that it is readable, quick to process, and for developers on Mac OS there are ready-made tools for working with it.
Many plist files with application settings are located in Home> Library> Preferences (for example, com.apple.finder.plist, com.skype.skype.plist). The file name consists of 4 parts: com. company . application .plist.
That's, like, that's all. I would be glad if someone complements or corrects.