NSFileManagerUnmountDissentingProcessIdentifierErrorKey
The process identifier of the process that prevented a volume from unmounting.
Declaration
let NSFileManagerUnmountDissentingProcessIdentifierErrorKey: StringDiscussion
If unmountVolume(at:options:completionHandler:) fails, the error sent to its completion handler will contain a userInfo dictionary with this string as one of its keys. The value is the process identifier of the process that prevented the unmounting, as an NSNumber.