Thank you for the post.
“FileMaker 12 and earlier versions of FileMaker have not been tested or certified with OS X Yosemite (10.10). These products were developed and released before OS X Yosemite became available.
While these earlier versions may install and run on OS X Yosemite (10.10), you may encounter installation and stability issues for which there is no resolution.”
Additionally, for a list of all the operating systems tested to be compatible for FileMaker Server 9, please review the following knowledge base article: