I'm a pretty new PHP developer. I have a Macbook Pro, which comes with PHP pre-installed. In the PhpStorm editor, I'm being prompted because "PHP Home is not specified" when I'm trying to generate a PHPUnit test. I've looked all over my file system, but I can't seem to find the location that the PhpStorm UI wants. I'm sure it's a pretty basic question, but if someone could help, I would greatly appreciate it.