Remap HHKB Pro Eject key to Media Play/Pause setup script

hhkb_map_eject_to_play_pause.sh

#!/bin/bash

# Script to remap HHKB Pro Eject key to Media Play/Pause and set it up to run on startup

set -e

echo "Setting up HHKB Eject key → Media Play/Pause remap..."

# Apply the key remapping immediately
echo "→ Applying key remap..."
hidutil property --set '{"UserKeyMapping":[{"HIDKeyboardModifierMappingSrc":0xC000000B8,"HIDKeyboardModifierMappingDst":0xC000000CD}]}'

# Create LaunchAgents directory if it doesn't exist
LAUNCH_AGENTS_DIR="$HOME/Library/LaunchAgents"
echo "→ Creating LaunchAgents directory if needed..."
mkdir -p "$LAUNCH_AGENTS_DIR"

# Create the LaunchAgent plist file
PLIST_FILE="$LAUNCH_AGENTS_DIR/com.nanoant.KeyRemapping.plist"
echo "→ Creating LaunchAgent plist at $PLIST_FILE..."
cat > "$PLIST_FILE" << 'EOF'
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>Label</key>
    <string>com.nanoant.KeyRemapping</string>
    <key>ProgramArguments</key>
    <array>
        <string>/usr/bin/hidutil</string>
        <string>property</string>
        <string>--set</string>
        <string>{"UserKeyMapping":[{"HIDKeyboardModifierMappingSrc":0xC000000B8,"HIDKeyboardModifierMappingDst":0xC000000CD}]}</string>
    </array>
    <key>RunAtLoad</key>
    <true/>
</dict>
</plist>
EOF

# Validate the plist file
echo "→ Validating plist file..."
plutil "$PLIST_FILE"

# Load the LaunchAgent
echo "→ Loading LaunchAgent..."
launchctl unload "$PLIST_FILE" 2>/dev/null || true
launchctl load "$PLIST_FILE"

echo "✓ Setup complete! The Eject key is now remapped and will persist across reboots."

See original setup gist: https://gist.github.com/vadikgo/0ec180f8aa3324911c1daea305b92ece