FFmpeg: Symbol not found: _clock_gettime

I distributed the FFmpeg file built on Mac High Sierra.
When I tried to run it on OS X El Capitan, I got this error:

dyld: lazy symbol binding failed: Symbol not found: _clock_gettime
Referenced from: /Applications/ffmpeg/ffmpeg
Expected in: /usr/lib/libSystem.B.dylib

I've googled it and found it can be fixed by updating Mac OSto Sierra or doing brew update.
But I want to distribute FFmpeg to my clients, I can not ask them to do the updates, do I have another workaround for this?

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