# Core MIDI Macros ## Topics ### Macros [`#define CM_CONSTEXPR`](/documentation/CoreMIDI/CM_CONSTEXPR) [`static var badRequestID: MIDICIPropertyExchangeRequestID`](/documentation/CoreMIDI/MIDICIPropertyExchangeRequestID/badRequestID) [`#define kMIDIDriverInterface2ID`](/documentation/CoreMIDI/kMIDIDriverInterface2ID) [`#define kMIDIDriverInterface3ID`](/documentation/CoreMIDI/kMIDIDriverInterface3ID) [`#define kMIDIDriverInterfaceID`](/documentation/CoreMIDI/kMIDIDriverInterfaceID) [`#define kMIDIDriverTypeID`](/documentation/CoreMIDI/kMIDIDriverTypeID) [`#define MIDI_API_UNAVAILABLE_NON_MACOS`](/documentation/CoreMIDI/MIDI_API_UNAVAILABLE_NON_MACOS) [`#define MIDI_AVAILABLE_UMP1_1`](/documentation/CoreMIDI/MIDI_AVAILABLE_UMP1_1) [`#define MIDICI1_0_AVAILABILITY`](/documentation/CoreMIDI/MIDICI1_0_AVAILABILITY) [`#define MIDICI1_0_DEPRECATED`](/documentation/CoreMIDI/MIDICI1_0_DEPRECATED) [`#define MIDICI1_0`](/documentation/CoreMIDI/MIDICI1_0) [`#define MIDICI1_1_AVAILABILITY`](/documentation/CoreMIDI/MIDICI1_1_AVAILABILITY) [`#define MIDICI1_1_DEPRECATED`](/documentation/CoreMIDI/MIDICI1_1_DEPRECATED) [`#define MIDICI1_1`](/documentation/CoreMIDI/MIDICI1_1) [`#define MIDICI1_2`](/documentation/CoreMIDI/MIDICI1_2) [`#define MIDINETWORKSESSION_AVAILABLE`](/documentation/CoreMIDI/MIDINETWORKSESSION_AVAILABLE) [`static let endpointObject: MIDIUMPEndpointManager.DictionaryKey`](/documentation/CoreMIDI/MIDIUMPEndpointManager/DictionaryKey/endpointObject) [`static let functionBlockObject: MIDIUMPEndpointManager.DictionaryKey`](/documentation/CoreMIDI/MIDIUMPEndpointManager/DictionaryKey/functionBlockObject) --- 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)