Method 1: Use PHP 5.4
If you are using MAMP Pro, you can specify that your server runs PHP 5.4.4. This is the easiest method since it does not require that you modify the php.ini file.
IMPORTANT: Many web hosts do not yet allow you to use PHP 5.4. If you plan on transferring your MAMP site to a web host, find out if that host allows the use of PHP 5.4. If your host does not allow the use of PHP 5.4, then it’s better to use Method 2: Use PHP 5.3.14 and Edit php.ini.
- From the MAMP screen, click on Server > PHP and select PHP 5.4.4 from the PHP Version list.
- Click Apply to stop and restart Apache and MySQL.
- Now you should be able to proceed with the Joomla 3.0 installation.