Hey Chainik,
Thank you for the quick response. You are pointing to the right direction. It's fixed now.
So first, I tired
"otool -L /usr/local/bin/mpv| grep libvapoursynth", which is normal.
However, "otool -L /usr/local/opt/vapoursynth/lib/libvapoursynth-script.dylib" show that python 3.5 is not linked to anaconda but to brew cellar.
"ls -l /usr/local/opt/python3" is normal
So I uninstalled and reinstalled python3 with brew.
This redirected "otool -L /usr/local/opt/vapoursynth/lib/libvapoursynth-script.dylib" to anaconda.
Then I uninstalled and reinstalled SVP and vapoursynth. And now it's working properly!
Cheers,
Michael