DispatchQoS.QoSClass.unspecified The absence of a quality-of-service class. Declarationcase unspecified See AlsoGetting the Quality-of-Service ClassDispatchQoS.QoSClass.userInteractiveDispatchQoS.QoSClass.userInitiatedDispatchQoS.QoSClass.defaultDispatchQoS.QoSClass.utilityDispatchQoS.QoSClass.background