coreaudiod (Core Audio Daemon) is a safe macOS system process. coreaudiod is the central audio management daemon on macOS. It handles all audio input and output routing, manages audio device connections, provides the low-latency audio pipeline for applications, and processes audio format conversions. Every sound your Mac plays or records passes through coreaudiod. coreaudiod using moderate CPU during audio playback and recording is normal, especially with multiple audio streams or format conversion. Be concerned if it uses high CPU with no audio playing, or if it crashes repeatedly — this can indicate a corrupt audio driver or incompatible audio plugin.
Core Audio Daemon
coreaudiod is the central audio management daemon on macOS. It handles all audio input and output routing, manages audio device connections, provides the low-latency audio pipeline for applications, and processes audio format conversions. Every sound your Mac plays or records passes through coreaudiod.
No audio output despite volume being turned up and the correct device selected
Audio crackling, popping, or distortion during playback
High CPU usage from audio processing or format conversion
Audio device not appearing after connecting headphones or external speakers
Open Terminal and run 'sudo killall coreaudiod' to restart the audio daemon. launchd will automatically restart it within seconds. This resolves most audio issues including no sound, crackling, and device recognition problems.
Open Audio MIDI Setup from /Applications/Utilities/. Verify the correct input and output devices are selected, check that sample rates match (mismatched rates cause distortion), and ensure audio format settings are appropriate for your hardware.
Delete the audio preference files: ~/Library/Preferences/com.apple.audio.DeviceSettings.plist and ~/Library/Preferences/com.apple.audio.SystemSettings.plist, then restart coreaudiod. This resets all audio routing to defaults.
Virtual audio drivers (like Soundflower, BlackHole, or virtual meeting software) can conflict with coreaudiod. Check System Settings > Sound for unexpected audio devices, and try removing any virtual audio drivers to isolate the issue.
coreaudiod using moderate CPU during audio playback and recording is normal, especially with multiple audio streams or format conversion. Be concerned if it uses high CPU with no audio playing, or if it crashes repeatedly — this can indicate a corrupt audio driver or incompatible audio plugin.
CoreLock monitors coreaudiod's stability and resource usage, detects when third-party audio drivers or plugins are causing instability, and can identify unauthorized applications that have registered audio capture capabilities on your system.
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The most common fix is restarting coreaudiod. Open Terminal and run 'sudo killall coreaudiod.' If that doesn't work, check System Settings > Sound to verify the correct output device is selected, ensure the volume isn't muted, and check that no Bluetooth audio device is unexpectedly connected and capturing the audio output.
coreaudiod is macOS's central audio routing and processing engine. It manages all audio hardware (speakers, microphones, headphones), routes audio between applications and devices, handles sample rate conversion, and provides the low-latency audio pipeline that professional audio software relies on.
Yes. coreaudiod is a fundamental Apple system process that every Mac needs to produce or record sound. It runs as a system daemon managed by launchd, is code-signed by Apple, and is protected by System Integrity Protection. Without coreaudiod, your Mac would have no audio capability at all.
Download CoreLock to identify suspicious processes, detect threats, and keep your Mac running smoothly.
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