With the new versions of WordPress available to download and test, here’s how to use wp-cli to download and configure it all from the Terminal, you need to have wp-cli and MySQL installed as well as the rest of a working AMP stack.
Launch Terminal and [optionally] create and change directory into your desired webroot.
Replace the placeholders in square brackets with your values and remove the square brackets.
Replace the placeholders in double quotes “” with your values and either keep or remove the double quotes.
Create a new blank database
mysql -u [USERNAME] -p[PASSWORD] -e "create database [DATABASE_NAME];"
Download the latest WordPress
wp core download --version=4.0-beta2
Create a Database wp-config.php file
wp core config --dbname="DBNAME" --dbuser="DBUSER" --dbpass="DBPASSWORD"
Finish the Install
wp core install --url="http://BLOG_URL" --title="BLOG_NAME" --admin_user="ADMIN_USER" --admin_password="PASSWORD" --admin_email="ADMIN_EMAIL"
Add Demo Content Plugin
wp plugin install wp-example-content
It may be useful to test the version with some content already populated, there a few plugins that do this, in the one above you can add a bunch of posts and pages.
Here are WordPress release archive download links.