This is from the Search for BOSS page:
System Requirements
Windows
- Windows Vista, Windows XP SP2, or Windows Server 2003
- 128 MB RAM (256 MB recommended)
- Dreamweaver CS4, Dreamweaver CS3
Macintosh
- Mac PowerPC or Mac Intel
- MacOS 10.4.x, MacOS 10.5.x
- Dreamweaver CS4, Dreamweaver CS3
Hosting requirements
- PHP 5+
- Linux and Windows hosts supported