NSPersistentStoreOSCompatibility
Key to represent the earliest version of the operation system that the persistent store supports.
Declaration
let NSPersistentStoreOSCompatibility: StringDiscussion
The corresponding value is an NSNumber object that takes the form of the constants defined by the availability macros defined in /usr/include/AvailabilityMacros.h; for example 1040 represents OS X version 10.4.0.
Backward compatibility may preclude some features.