At this time, Adobe has not released a compatible Shockwave Player plugin for Mac OS X 10.10 Yosemite. In order to resolve this issue in the short term until a compatible Shockwave Player is released by Adobe, the following steps can be taken:
- Download the existing Shockwave Player plugin (atttached) and unzip it to your desktop
- Open finder, navigate to "/Library/Internet Plug-Ins/"
- Copy the plugin file into that folder (this might require administrator privileges)
- Restart your computer
- Shockwave player should now be available for installed browsers.”