DDJ RZX freezing

I'm having problems freezing frequently in my presentations, I've updated the firmware and it did not work, all other programs work normally, the export mode works normally, the performance mode locks frequently after 30 minutes of use. all the buttons do not work but the faders work. is a very expensive device for this type of problem. my mac: i7 2.8 ghz intel hd grafics 3000 512 MB 8 Gb ddr3 ssd 256 Gb