Error Messages: OUTPUT, HIGH, LOW

Running Processing 3.3.7 on Macbook Pro. Trying to compile Example 4.1 Blinking LED code but get error messages:

The variable "OUTPUT" does not exist
The variable "HIGH" does not exist
The variable "LOW" does not exist

Have tried to add #include <Arduino.h> but this statement is not recognized. How do I attach to the library that defines OUTPUT, HIGH, and LOW?

Also had to remove const from line 3.

See attached screenshot.

You're trying to compile C++ in a Java environment.

How can I get to a mode that will allow me to compile the code from the book Make: Getting Started with Arduino, 3rd Edition?

By downloading the Arduino IDE.
I'm sorry I've never owned any Apple products, so that's about the limit of the help I can offer.

(deleted)

Thanks.