Property list files

A .plist file (Property List) commonly stores a set of user-preferences or some metadata about an app. It is a list of key-values.

The data's format is either binary or XML.

We may view or edit data with Xcode or plutil. We may use a text editor for XML ones.

plutil -p Info.plist
plutil -p "/Applications/Discord.app/Contents/Info.plist"

we may use file to detect if it's binary or XML:

file Info.plist
## Info.plist: XML 1.0 document text, ASCII text