DDJ SP1 CRASH USING FX

Hi,

i use DDJ SP1 with Macbook Pro (El Capitan) e SL3 with vinyl.

Everytime i use the fx in SP1, Serato Dj crash immediately.

I try with another mac and don't crash, so there's something in my computer that disturb, but i don't know what.

I have cancelled scratch live and itch, i have reinstalled Serato DJ but the problem is the same. 

I don't have many app or strange programs.

Can you help me please???