Thank you for your post.
FileMaker Pro 9 was certified under Mac OS X 10.4 and 10.5. With that said, I was able to install and run FileMaker Pro 9.0v3 under Mac OS X 10.8.5. If your copy of FileMaker Pro 9 requires activation, then if you are located in North America, please contact our Customer Care department at toll-free 800-325-2747 to receive a replacement license key. If outside of North America, contact the FileMaker office nearest you.