Launchd script to keep a macOS app to always run even if it closes randomly (issue I'm having from crashes). Place in ~/Library/LaunchAgents and run <code>launchctl load ~/Library/LaunchAgents/FILENAME.plist</code>

launchd-script-to-keep-macos-app-running-at-all-times.plist

<?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>RunAtLoad</key>  
        <true/>  
        <key>KeepAlive</key>
        <true/>
        <key>Label</key>
        <string>App.restart</string>
        <key>ProgramArguments</key>
        <array>
                <string>/path/to/App.app/Contents/MacOS/App</string>
        </array>
</dict>
</plist>