I understand it works for everybody else. Here is some further tests by adding lines
void setup()
{
Serial.begin(9600);
Serial.println(1234);
Serial.println(5678);
Serial.println("hello world");
}
void loop()
{}
Gives the first Serial output.
If I change the code to print a blank line so that it looks like
void setup()
{
Serial.begin(9600);
Serial.println();
Serial.println(1234);
Serial.println(5678);
Serial.println("hello world");
}
void loop()
{}
then I get the next result. It's a workaround, but it should not be necessary. Why is my iMac (10.9.2) doing this?

