# IOUserMIDIDevice ``` class IOUserMIDIDevice; ``` ## Topics ### Instance Methods [`virtual kern_return_t AbortDeviceConfigurationChange(uint64_t changeAction, OSObject *changeInfo);`](/documentation/MIDIDriverKit/IOUserMIDIDevice/AbortDeviceConfigurationChange) [`kern_return_t AddEntity(IOUserMIDIEntity *entity);`](/documentation/MIDIDriverKit/IOUserMIDIDevice/AddEntity) [`virtual IOUserMIDIClassID GetBaseClassID() const;`](/documentation/MIDIDriverKit/IOUserMIDIDevice/GetBaseClassID) [`virtual IOUserMIDIClassID GetClassID() const;`](/documentation/MIDIDriverKit/IOUserMIDIDevice/GetClassID) [`bool GetDeviceIsRunning() const;`](/documentation/MIDIDriverKit/IOUserMIDIDevice/GetDeviceIsRunning) [`OSSharedPtr GetEntities() const;`](/documentation/MIDIDriverKit/IOUserMIDIDevice/GetEntities) [`virtual kern_return_t PerformDeviceConfigurationChange(uint64_t changeAction, OSObject *changeInfo);`](/documentation/MIDIDriverKit/IOUserMIDIDevice/PerformDeviceConfigurationChange) [`kern_return_t RemoveEntity(IOUserMIDIEntity *entity);`](/documentation/MIDIDriverKit/IOUserMIDIDevice/RemoveEntity) [`kern_return_t RequestDeviceConfigurationChange(uint64_t changeAction, OSObject *changeInfo);`](/documentation/MIDIDriverKit/IOUserMIDIDevice/RequestDeviceConfigurationChange) [`virtual kern_return_t SetProperties(OSDictionary *propertyDictionary);`](/documentation/MIDIDriverKit/IOUserMIDIDevice/SetProperties) [`virtual kern_return_t StartIO();`](/documentation/MIDIDriverKit/IOUserMIDIDevice/StartIO) [`virtual kern_return_t StopIO();`](/documentation/MIDIDriverKit/IOUserMIDIDevice/StopIO) [`virtual void free();`](/documentation/MIDIDriverKit/IOUserMIDIDevice/free) [`virtual bool init(IOUserMIDIDriver *driver, OSString *deviceUID, OSString *modelUID, OSString *manufacturerUID);`](/documentation/MIDIDriverKit/IOUserMIDIDevice/init) ### Type Methods [`static OSSharedPtr Create(IOUserMIDIDriver *driver, OSString *deviceUID, OSString *modelUID, OSString *manufacturerUID);`](/documentation/MIDIDriverKit/IOUserMIDIDevice/Create) ## Relationships ### Inherits From [`IOUserMIDIObject`](/documentation/MIDIDriverKit/IOUserMIDIObject) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)