Mac shutdown when connecting Arduino Nano 33 BLE


I just bought a (genuine) Arduino Nano 33 BLE, installed the latest version of Arduino IDE on my MacBookPro (2009) running Mac os X 10.11 El Capitan.

From the IDE I can see the Arduino Nano Board, and from ports I select /dev/cu.usbmodem411.

Few seconds after running "Upload" my Mac shutdown.

Any idea?

In the past I programmed without problems an Arduino Mega on the same laptop.

Thanks a lot,