Restart bluetoothd in macOS

bluetoohtd-restart.sh

#!/bin/sh

#kill bluetoothd to reset bluetooth wonkiness in macOS
#catalina, big sur, monterey
#fixes continuity, magic keyboard mismapping of function keys, magic mouse scrolling

current_userid=$(id -u)
if [ $current_userid -ne 0 ]; then
    echo "$(basename "$0") requires superuser privileges to run" >&2
    echo "try: \033[1;36msudo $(basename "$0")" >&2
    exit 1
fi

launchd_bluetoothd=$(launchctl list|/usr/bin/grep com.apple.bluetoothd|/usr/bin/awk -F ' ' '{ print $3 }')
if [  $launchd_bluetoothd != "com.apple.bluetoothd" ]; then
    echo "com.apple.bluetoothd LaunchDaemon was not found." >&2
    exit 1
fi

echo "Restarting bluetoothd. Bluetooth devices will reconnect momentarily." >&2
launchctl stop com.apple.bluetoothd && launchctl start com.apple.bluetoothd
exit 0

This fixes wonky bluetooth keyboard function key mappings and Continuity when it stops working.