If you have created a user mapping and not saved it, or have an auto-saved mapping, sometimes you may experience what's known as a MIDI Conflict.
This means you can hit a function on say a Sixty-Two, like the Mic ON button, and it sets off an SP6 sample, or you press Flex FX and it activates a loop, etc.
To remedy this you will need to rename your MIDI folder in the _Serato_ folder.
If you have saved mappings you can copy them over after.
Follow these steps:
1. Close Serato DJ
2. In finder, go to your Music folder and find the _Serato_ folder
3. In the _Serato_ folder you’ll find the MIDI folder
4. Click on the name of the folder and rename it to MIDIOLD
5. Open Serato DJ (this will create a new MIDI folder)
Connect your hardware, and now you shouldn't have any conflicting midi information.
If you have a saved mapping, you can copy it over from the MIDIOLD folder to the newly created one. Make sure to paste it in the XML folder, inside the new MIDI folder.