Your system needs to meet the following requirements before proceeding the installation - Joomla 3

Software

• PHP (Magic Quotes GPC off): 5.3.1+ (5.4+ recommended)

Databases

• MySQL(InnoDB support required): 5.1+
• MSSQL 10.50.1600.1+
• PostgreSQL 8.3.18+

Web Servers

• Apache 2.x+
• Microsoft IIS 7
• Nginx 1.0 (1.1 recommended)

Your system needs to meet the following requirements before proceeding the installation - Joomla 2.5+

Software

• PHP 5.2.4+ (5.4+ recommended)
• MySQL: 5.0.4+

Web Server

• Apache: 2.x+
• Microsoft: IIS 7
• Nginx: 1.0 (1.1 recommended)

The requirements are the same with both Joomla 2.5 and Joomla 3

• Firefox 4+
• IE (Internet Explorer) 8+
• Google Chrome 10+
• Opera 10+
• Safari 5+

The requirements are the same with both Joomla 2.5 and Joomla 3

During development process, Localhost is preferred. You can use the following servers on your PC to develop your site.

Windows

• WAMPSEVER
• XAMPP for Windows

Linux

• LAMP Bubdle
• XAMPP for Linux

Mac OS

• MAMP & MAMP Pro
• XAMPP for Mac OS