I tried to install ooVoo on my iMac, but it would only create a folder called ooVoo.app with a red minus sign at the bottom right.
You can’t open the application “ooVoo.app” because it is not supported on this architecture.
The solution is to install ooVoo to your Desktop, and then drag the ooVoo icon to your Applications folder.
The ooVoo installer itself seems to be what’s broken. This is true as of version 18.104.22.168.