Thanks! After updating to latest SVP, it works in VLC.

I'm having a similar problem with a Apple M1.
Now that homebrew supports M1 natively with install in /opt, everything works fine in MPV after configuring according to the wiki, but VLC gets the same error message as above "Please install Vapoursynth via Homebrew".

I've tried symlinking the /opt library filder to /usr/local/opt, but still get the same message.

How to convince SVP that vapoursynth is actually installed in /opt and to enable SVP in VLC?