LOL. "Wrong!" "Wrong again!" "Still wrong!" Fine. I tracked down the relevant official documentation: https://developer.apple.com/library/archive/documenta

LOL. "Wrong!" "Wrong again!" "Still wrong!" Fine. I tracked down the relevant official documentation: https://developer.apple.com/library/archive/documentation/CoreFoundation/Conceptual/CFBundles/AboutBundles/AboutBundles.html https://developer.apple.com/library/archive/documentation/Co... > • A package is any directory that the Finder presents to the user as if it were a single file. > • A bundle is a directory with a standardized hierarchical structure that holds executable code and the resources used by that code. [...] > The Finder considers a directory to be a package if any of the following conditions are true: > • The directory has a known filename extension: .app, .bundle, .framework, .plugin, .kext, and so on. > • The directory has an extension that some other application claims represents a package type; see Document Packages. > • The directory has its package bit set.