Audio Unit Extensions now support user presets that are available across all host apps.The AVAudioSession.RouteSharingPolicy enumeration is extended to allow apps to specify route sharing policies so their audio and video is routed to the same location as AirPlay.A new property, AVAudioSession.PromptStyle informs apps which style of voice prompt they should play based on other audio activity in the system.A new AVAudioSession property allows system sounds and haptics to play while the session is actively using audio input.A new rendering mode in AVAudioEnvironmentNode selects the best spatial audio rendering algorithm automatically based on the output device.A new method is available for an AVAudioEngine based app to retrieve a list of all nodes attached to an AVAudioEngine instance. You can use new AVAudioNode types to wrap a user-defined block for sending or receiving data in real-time.This might cause subsequent operations requiring authentication to fail. When using the SecureEnclave API with access control set on keys, users might not be prompted to authenticate.On Macs with the Apple T2 Security Chip, VoiceOver is currently unavailable while in macOS Recovery.The remaining stub frameworks are nonfunctional and exist only for compatibility purposes. Migration Assistant is currently unable to correctly migrate data from a Mac running macOS 10.15 to another Mac running macOS 10.15.Installing third party kernel extensions now requires that you restart your Mac before they’re permitted to load.
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