"Microsoft has announced that Silverlight 1.0 Release Candidate and Silverlight 1.1 Alpha Refresh versions are now available for download. Everyone is encouraged to upgrade immediately to the new versions, as the previous versions will soon expire and cease to work. Developers will also want to check out the Silverlight 1.0 Add-on for Visual Studio 2008 CTP"
Download Silverlight 1.0 Release Candidate
Mac OS XFor Developers Only: Download Silverlight 1.1 Alpha Refresh
Note: This is a pre-release version of Silverlight that developers may use for evaluationSilverlight 1.1 Alpha Refresh is intended for developers and designers interested in learning more about how to build experiences with Silverlight using both managed code (C#) and script.
Mac OS X