Fix audio by restarting coreaudiod on macOS

fix-mac-audio.sh

# macOS regularly enters a bad state where audio doesn't play at all or the sound levels are miscalibrated and the
# speakers are quiet even at high volume settings. Various sites suggest different approaches, some of which worked for me
# and some which didn't.
#
# Restarting the audio daemon is ideal since you don't need to restart your computer and fortunately it has worked in
# several scenarios for me.

# This works for me the most when my audio doesn't work on video calls or when my sound levels are miscalibrated
sudo launchctl stop com.apple.audio.coreaudiod
sudo launchctl start com.apple.audio.coreaudiod

# An alternative, which may not work due to System Integrity Protection
sudo launchctl unload /System/Library/LaunchDaemons/com.apple.audio.coreaudiod.plist
sudo launchctl load /System/Library/LaunchDaemons/com.apple.audio.coreaudiod.plist

# Another approach that hasn't worked for me
sudo killall coreaudiod

# Restarting the computer typically helps
# If issues persist, resetting the NVRAM helps as well: https://support.apple.com/en-us/HT204063