FileMaker 15 is a 32-bit/64-bit hybrid application. Modern macOS versions (macOS Catalina and later) dropped all 32-bit support entirely. FileMaker 15 will not launch on modern macOS or Apple Silicon (M1/M2/M3) Macs.
Visit the official Claris website to download a 45-day trial of the latest FileMaker Pro version. filemaker pro 15 license key link