# Deprecated Symbols Review unsupported symbols and their replacements. ## Topics ### Managing System Setup [`extern OSStatus MIDISetupCreate(MIDISetupRef *outSetup);`](/documentation/CoreMIDI/MIDISetupCreate) Queries drivers to discover what hardware is available. [`extern OSStatus MIDISetupDispose(MIDISetupRef setup);`](/documentation/CoreMIDI/MIDISetupDispose) Disposes the specified setup object. [`extern OSStatus MIDISetupFromData(CFDataRef data, MIDISetupRef *outSetup);`](/documentation/CoreMIDI/MIDISetupFromData) Creates a MIDISetup object from an XML stream. [`extern OSStatus MIDISetupGetCurrent(MIDISetupRef *outSetup);`](/documentation/CoreMIDI/MIDISetupGetCurrent) Returns the system’s current MIDISetup. [`extern OSStatus MIDISetupInstall(MIDISetupRef setup);`](/documentation/CoreMIDI/MIDISetupInstall) Installs a MIDISetup as the system’s current state. [`extern OSStatus MIDISetupToData(MIDISetupRef setup, CFDataRef*outData);`](/documentation/CoreMIDI/MIDISetupToData) Creates an XML representation of a MIDISetup object. [`typealias MIDISetupRef`](/documentation/CoreMIDI/MIDISetupRef) A type that represents the global state of the MIDI system, that contains lists of the devices and serial port owners. ### Managing Serial Ports [`extern OSStatus MIDIGetSerialPortOwner(CFStringRef portName, CFStringRef*outDriverName);`](/documentation/CoreMIDI/MIDIGetSerialPortOwner) Returns the MIDI driver that owns a serial port. [`extern OSStatus MIDISetSerialPortOwner(CFStringRef portName, CFStringRef driverName);`](/documentation/CoreMIDI/MIDISetSerialPortOwner) Specifies the MIDI driver that owns a serial port. [`extern OSStatus MIDIGetSerialPortDrivers(CFArrayRef*outDriverNames);`](/documentation/CoreMIDI/MIDIGetSerialPortDrivers) Returns a list of installed MIDI drivers for serial port MIDI devices. ### Managing MIDI Devices [`func MIDIDeviceAddEntity(MIDIDeviceRef, CFString, Bool, Int, Int, UnsafeMutablePointer) -> OSStatus`](/documentation/CoreMIDI/MIDIDeviceAddEntity(_:_:_:_:_:_:)) Specifies one of the entities that make up a device. --- 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)