This may mean many things. First, go through the process described in the H8000FW manual under "Installing Drivers on Your Macintosh" and "Configuring the H8000FW for Macintosh Output". Also try "Troubleshooting Mac systems." If you cannot make this work, email support@eventide.com.
For reasons beyond our control it is not possible to use the H8000FW as a plugin with Protools at this time – you have to set it up as a Core Audio device.
