Issue:
The execution of the script to flash the firmware for the Arduino Nano 33 BLE Sense could be blocked by the following two messages when using macOS.
The Most Easy method is go to setting > privacy &security > scroll down to security. you will find an option to open anyways of the file and it will execute. or you can simple click on the question mark icon which will open an help folder and on step one there will be an option for “open Privacy and security for me”