JetBrains PhpStorm is a commercial, cross-platform IDE for PHP built by JetBrains.
PhpStorm is perfect for working with different framework and CMS like Symfony, Drupal, WordPress, Zend Framework, Laravel, Magento, Joomla!, CakePHP, Yii, and other frameworks.
Follow below steps to install PhpStorm on MacOS High Sierra v10
Step 1: go to this url
Step 2: Select "MacOS" if not already selected and click on Download button
Step 3: Open Downloaded file
Step 4: Drag PhpStorm icon to Application folder icon. This will open Application folder.
Step 5: Open PhpStorm from "Applications" Folder
Step 6: Select "Open"
Step 7: Click "OK" if you do not want to import settings otherwise select "Custom Location"
Step 8: Scroll down to enable "Accept" button and click on it.
Step 9: Make your choice of sending data
Step 10: Buy or Login with your credentials