NSProgressFileAnimationImageOriginalRectKey
A key with a corresponding value that indicates the starting location of the image onscreen.
NSProgressFileCompletedCountKey
A key with a corresponding value that represents the number of completed files.
NSProgressFileIconKey
A key with a corresponding value that must be an image, typically an icon to represent the file.
NSProgressFileOperationKindKey
A key with a corresponding value that indicates the kind of file operation a progress object represents.
NSProgressFileTotalCountKey
A key with a corresponding value that represents the total number of files within a file operation.
NSProgressFileURLKey
A key with a corresponding value that represents the file URL of a file operation for the progress object.