Unity "Save" for tvOS Build is greyed out

Is it too early to start a thread for tvOS?

Running Unity 5.3.2p1 and am trying to make a build of my iOS game for tvOS for the first time. I've installed all packages (at least I think I did) and have "tvOS" as my current platform in Unity. Running Xcode 7.2. OS X Yosemite.

However, when I go to "Build", the dialog for "Build tvOS" pop-ups up for me to select the directory
but the "Save" button is never enabled.

What am I missing?

Thanks,
Manny