Apple has recently updated their Final Cut Pro software to Final Cut Pro X.
This new version of Final Cut Pro does not work with some QuickTime components, like the one that Turbo.264 HD installs.
That means that you cannot initiate an Export from Final Cut Pro X, using Turbo.264 HD.
For now, our recommendation would be to continue to use an earlier version of Final Cut Pro, if you want to use Turbo.264 HD as part of your workflow.
This new version of Final Cut Pro does not work with some QuickTime components, like the one that Turbo.264 HD installs.
That means that you cannot initiate an Export from Final Cut Pro X, using Turbo.264 HD.
For now, our recommendation would be to continue to use an earlier version of Final Cut Pro, if you want to use Turbo.264 HD as part of your workflow.