Windows

• 2GHz or faster processor
• Microsoft® Windows® XP with Service Pack 3, Windows Vista® Ultimate or Enterprise (32 or 64 bit running in 32-bit mode), Windows Server® 2008 (32 bit), or Windows® 7 (32 or 64 bit running in 32-bit mode)
• 1GB of RAM (2GB recommended)
• 1.5GB of available hard-disk space
• Java™ Virtual Machine (32 bit): IBM® JRE 1.6 or Sun™ JRE 1.6
• 1024x768 display (1280x800 recommended) with 16-bit video card
• DVD-ROM drive
• Eclipse™ 3.6.1 (for plug-in installation)*
  

Mac OS

• Intel® processor
• Mac OSX v10.6
• 1GB of RAM (2GB recommended)
• 1.5GB of available hard-disk space
• Java Virtual Machine (32 bit): JRE 1.6
• 1024x768 display (1280x800 recommended) with 16-bit video card
• DVD-ROM drive
• Eclipse 3.6 Cocoa version (for plug-in installation)*

* The following distributions are supported: Eclipse IDE for Java EE developers, Eclipse IDE for Java developers, Eclipse Classic, Eclipse for PHP developers.

Flash Builder 4 data-centric development features

• Adobe® ColdFusion® server: ColdFusion 8.0.1 or 9.0.1
• J2EE server: BlazeDS 4 or Adobe LiveCycle® Data Services 3.1
• PHP server: Zend Server Community Edition 5.x, Zend Server 5.x, or Apache 2.2 / Microsoft IIS 5, 6, or 7 with PHP 5.2 and later
• Web services: Web Services Description Language (WSDL) 1.1
  

Flex Builder 4 system requirements

Windows

• 2-GHz or faster processor
• Microsoft® Windows® XP with Service Pack 3, Windows Vista® Ultimate or Enterprise (32 or 64 bit running in 32-bit mode), Windows Server® 2008 (32 bit), or Windows 7 (32 or 64 bit running in 32-bit mode)
• 1 GB of RAM (2 GB recommended)
• 1 GB of available hard-disk space
• Java™ Virtual Machine (32 bit): IBM® JRE 1.5, Sun™ JRE 1.5, IBM JRE 1.6, or Sun JRE 1.6
• 1024 x 768 display (1280x800 recommended) with 16-bit video card
• DVD-ROM drive
• Eclipse 3.4.2 or 3.5 (for plug-in installation)

Mac OS

• Intel® processor
• Mac OS X v10.5.6–10.6
• 1 GB of RAM (2 GB recommended)
• 1 GB of available hard-disk space
• Java Virtual Machine (32 bit): JRE 1.5 or 1.6
• 1024x768 display (1280x800 recommended) with 16-bit video card
• DVD-ROM drive
• Eclipse 3.4.2 or 3.5 Carbon version (for plug-in installation)

Flash Builder 4 data-centric development features

• Adobe® ColdFusion® server: ColdFusion 8.0.1 or 9
• J2EE server: BlazeDS 4 or Adobe LiveCycle® Data Services 3
• PHP server: PHP 5.2 or Zend Framework 1.9.4 (included with Flash® Builder™ 4)
• Web services: WSDL 1.1

Flex Builder 3 system requirements (Standard and Professional)

Windows

• Intel® Pentium® 4 processor
• Microsoft® Windows® XP with Service Pack 2 or Windows Vista® Home (Premium or Basic), Business, or Ultimate (Windows 7 not supported)
• 1 GB of RAM (2 GB recommended)
• 500 MB of available hard-disk space (additional 500 MB required for plug-in configuration)
• Java™ Virtual Machine: Sun™ JRE 1.4.2, Sun JRE 1.5 (included), IBM® JRE 1.5, or Sun JRE 1.6
• Eclipse™ 3.2.2, 3.3, and 3.4 for plug-in configuration (Eclipse 3.3 recommended for Windows Vista)
• Adobe® Flash® Player 9 software*

Flex Builder 3 for Windows has also been tested to work with these specific products:

• BEA Workshop 10.1
• IBM Rational Software Architect 7.0.0.3 (Eclipse 3.3 plug-in configuration only)

Mac OS

• PowerPC® G4 1.25-GHz or Intel processor
• Mac OS X v10.4.7–10.4.10 or 10.5 (Mac OS X v10.6 not supported)
• 1 GB of RAM (2 GB of RAM recommended)
• 500 MB of available hard-disk space
• Java Virtual Machine: JRE 1.5 or JRE 1.6 from Apple. NOTE: Flex Builder 3.0.2 does not run with Java for Mac OS X 10.5 Update 1 / 64-bit Java SE 6 version 1.6.0_05.
• Eclipse 3.2.2 , 3.3 and 3.4 (for plug-in configuration)
• Adobe Flash Player 9 software*

* New Adobe Flex® Builder™ 3 projects create applications that require users to have Adobe Flash Player 9 (9.0.124.0). You can change this requirement to an earlier version of Flash Player 9 in the Flex Compiler section of your project's properties.