HOW-TO: Serial.print() to cpecific row & collu

This is a VT100 (or VT52) emulation code. You can probably set the emulation mode of the iTerm. If you search for VT100 codes you will find many of them also to make values BOLD etc

void setup()
{
  Serial.begin(9600);
}

void loop()
{
  String OFF = "\033[0m";
  String BOLD = "\033[1m";
  
  Serial.print(BOLD);
  Serial.println("Hello World");
  Serial.print(OFF);
  Serial.println("Goodbye");
  while(1);
}