I am currently running FileMaker Server 12 on a computer which also runs OSX Server for centralized "external" authentication for database access. This is in accord with the instructions on FileMaker's External Authentication web page (http://help.filemaker.com/app/answers/detail/a_id/5508/~/setting-up-filemaker-pro-clients-and-filemaker-server-to-use-external) which says "On Mac OS, it is recommended that Mac OS X Server be used to run FileMaker Server."
I am interested in updating to FileMaker 13 Server. However FileMaker 13 Server's specs page indicates is is not compatible with Mavericks Server, only with the standard/client OS. Does that mean external authentication is not possible when running the current version of both the OS and FileMaker? Or has someone found a way to accomplish this?