The value of this attribute is an
NSNumber object containing a float. For RTF files only, stores the version of Cocoa with which the file was created. Absence of this value indicates RTF file not created by Cocoa or its predecessors.
- iOS 13.0+
- macOS 10.4+
- Mac Catalyst 13.0+
- tvOS 13.0+
- watchOS 6.0+
Values less than 100 are pre–macOS; 100 is OS X v10.0 or v10.1; 102 is OS X v10.2 and 10.3; values greater than 102 correspond to values of
NSApp in macOS 10.4 and later.
OS X v10.3 and earlier string constant is