1. Launch Terminal.
• Type sudo pico /etc/hosts and hit return.
• Type your admin password then hit return. (characters are not visible)
• Use your arrow keyboard to get to the right line. Type 127.0.0.1 localhost.donalyza (you can change “donalyza” to another name)
• Once you are done, hit the CTRL-X keys, then save changes by hitting the Y to indicate yes.
2. Download and Install MAMP.
3. Download WordPress.
4. Open Finder
• Go to /Users/[username]/Sites. Then drag the downloaded WordPress folder into the Sites folder.
5. Open MAMP.
• Click Open Start Page button, (default browser will automatically will run).
• Under MYSQL click the link phpMyAdmin.
• In the field Create new database, type wpdb then click Create button.
6. Go to Finder.
• go to path Sites>WordPress folder, open wp-config-sample.php file. There are several items here that we need to change.
• After /** The name of the database for WordPress */, change ‘database_name_here’ to ‘wpdb’.
• After /** MySQL database username */, change ‘username_here’ to’root’.
• After /** MySQL database password */, change ‘username_here’ to ‘root’.
• After /* That’s all, stop editing! Happy blogging. */, add define(‘WP_ALLOW_MULTISITE’, true);.
• Save as file to wp-config.php.
7. Relaunch MAMP.
• Click Preferences > Ports tab then click Set to default Apache and MYSQL ports button.
• Click Preferences > Apache tab select the folder where you save the WordPress folder. eg. /Users/[username]/Sites/wordpress.
• Open Safari.
• Type http://localhost.donalyza
8. Install WordPress.
• Under WordPress Dashboard, Go to Tools > Network. Select Sub-Directories (Sub-domain will not work on localhost).
• Follow the instructions in Enabling the Network provided by WordPress.

Everything should be up and running by now. If something is not right on the steps I provided feel free to let me know. Cheers!