Ctrl+Click the file that appears on the Desktop.

Mount the Silverlight image that is on your desktop.

If the installation automatically launches quit out of it and complete the following steps. On the lower right side of the screen you will see Install Silverlight, Choose Silverlight Mac Runtime and allow this to download to your desktop.

Launch your web browser (FireFox/Safari) and visit /GetStarted.(Note: when completing these steps make sure you have quit our of all running Applications and that they have not just been minimized to the Dock) To manually install Silverlight please follow the steps outlined below: Check your Trash to make sure there is nothing you want to keep then empty your Trash.Look for the .plist file and move it to the trash.Look for the file and move it to the trash.Browse to Mac HDLibraryApplication SupportMicrosoftPlayReady and delete the PlayReady folder.This process was recommended by Microsoft Technical Support. Delete the PlayReady folder (This step fixed my problem).You may not need to go all the way through the process to fix the problem.

Enabling silverlight on mac chrome 59