If your Serato isn't reading your new Hardware
On your Mac follow these steps...

1. Go to spotlight on the top right corner of your computer screen of your Desktop (Click the Magnify Glass)
2. Type "MIDI"
3. Click "Audio MIDI Setup"
4. Click the "Window" Tab and click on "Show MIDI Window"
5. Click on "Default" Drop down menu and "choose new configuration."
6. Title it anything and click "OK". You should now see your hardware device name in the window.
7. Restart Serato and your Hardware should pop up.