In order to be compatible with Apple's latest line of MacBook Pros, the Apogee Symphony Mobile card requires a firmware update. If you do not perform this upgrade and try to boot with the Symphony Mobile card installed, your Mac will not boot properly. Simply remove the Symphony Mobile card and restart your computer. If your MacBook Pro is already booted and you insert the Symphony Mobile card, your Mac will become unresponsive. Again, just remove the Symphony Mobile card and restart. Here's the catch: this firmware upgrade must be performed using a previous generation MacBook Pro. Apogee will be releasing an upgrade for the Symphony Mobile firmware in the next few days.