Fix MacBook Sound Not Working

By Zennith Tech Lab • Published 2026-05-22 •
macOSAudioHardwareMacBook

Reset your MacBook Core Audio background process to restore built-in audio streams instantly.

Core Audio Reset

Force quit the system coreaudiod daemon in terminal to restart the entire macOS audio system.

# Step 1: Restart CoreAudiod Daemon

1. Open Finder > Applications > Utilities and open Terminal. 2. Type this command and press Enter:

``bash # Force quit the system core audio process to restart it sudo killall coreaudiod ``

3. Enter your admin password when prompted and test audio output.

# Step 2: Clear NVRAM/PRAM (Intel Macs Only)

If hardware values are stuck, reset the Mac's physical system values: 1. Shut down your Mac. 2. Turn it on and immediately hold Option + Command + P + R keys simultaneously. 3. Keep holding them for about 20 seconds, release them, and test speaker output.