16.0.4 Server states that it requires macOS 10.12, and to update your OS
first if you're running 10.11.
Whenever we do a major OS X/macOS update, we usually unstall FileMaker
Server first, do the system update, then reinstall FileMaker Server.
That said, does anyone know if uninstalling FileMaker Server first is
necessary before doing the 10.11 -> 10.12 update in this case?