AudioToolbox macOS 10.12 to 10.13 API Differences

AUAudioUnit.h
Added AUMIDIOutputEventBlock
Added AUAudioUnit.audioUnitShortName
Added AUAudioUnit.MIDIOutputNames
Added AUAudioUnit.providesUserInterface
Added AUAudioUnit.MIDIOutputEventBlock
Added AUAudioUnit.deviceInputLatency
Added AUAudioUnit.deviceOutputLatency
Added AUAudioUnit.running
Added AUAudioUnitBus.shouldAllocateBuffer
AUAudioUnitImplementation.h
Added AUAudioUnit.MIDIOutputBufferSizeHint
AUComponent.h
Added kAudioUnitErr_MIDIOutputBufferFull
Added kAudioUnitErr_ExtensionNotFound
Added AudioUnitExtensionSetComponentList()
Added AudioUnitExtensionCopyComponentList()
AudioFile.h
Added kAudioFileRF64Type
Added kAudioFileFLACType
AudioFileStream.h
Modified AudioFileStreamParseBytes()
Declaration
FromOSStatus AudioFileStreamParseBytes(AudioFileStreamID _Nonnull inAudioFileStream, UInt32 inDataByteSize, const void * _Nonnull inData, AudioFileStreamParseFlags inFlags)
ToOSStatus AudioFileStreamParseBytes(AudioFileStreamID _Nonnull inAudioFileStream, UInt32 inDataByteSize, const void * _Nullable inData, AudioFileStreamParseFlags inFlags)

AudioUnitProperties.h
Added kSpatializationAlgorithm_HRTFHQ