Microsoft Silverlight is an application framework used by website developers to provide an enhanced user experience through interactive user interfaces. Multimedia and animation is seamlessly delivered with Silverlight in a manner that engages the user. If you want to view websites that use Silverlight in Mac OS X, you must install the Silverlight browser plugin that is compatible with Safari and Mozilla Firefox. The Silverlight browser plugin is a free download and it is available in the downloads section of Apple's website.
Open your Web browser and go to Silverlight on Apple's Downloads page.
Click the download icon to download the installer. Close your Web browser once the download is complete.
Double-click the "Silverlight.3.0.pkg" icon located where you saved the file to open it. The "Install Microsoft Silverlight Browser Plug-In" dialogue box will appear.
Click the "Continue" button when asked to run the installer.
Click the "Continue" button to proceed with the installation.
Read the Software License Agreement, then click the "Continue" button.
Click the "Agree" button if you agree with the terms of the software license agreement.
Click the icon of the volume that you want to install the plugin on, then click the "Continue" button.
Click the "Install" button. Enter your name and password if asked to do so, and click "OK."
Click the "Close" button once the message appears stating that the installation was successful.
Open Safari or Firefox and go to a website using Silverlight to test the plugin.