Before you install, be aware that FileMaker 16 was designed for older versions of macOS (like macOS 10.12 Sierra 10.13 High Sierra ). Modern Mac hardware—especially Apple Silicon (M1/M2/M3)
with your original licensing information is often the only official way to regain access to the installer. Legacy Portals Filemaker Pro 16 Download Mac
If you need version 16 specifically to run an old database or work on an older Mac: How do I download older FMP client software?! Before you install, be aware that FileMaker 16
: When prompted, enter your 35-digit license key or upload your license certificate. : After installation, use the Help > Check for Updates Before you install