Easy steps to install vapoursynth-sub package on Mac
Package Information:
Application Name – vapoursynth-sub
What is vapoursynth-sub – vapoursynth-sub. Install command: brew install vapoursynth-sub. VapourSynth filters – Subtitling filter. http://www.vapoursynth.com. License: ISC.
Use of vapoursynth-sub – VapourSynth filters – Subtitling filter
URL – http://www.vapoursynth.com
Installation Steps:
- Open Terminal using Spotlight search by pressing  <command+space>. Type terminal and hitEnterkey.
- Now, run following command to install homebrew (brew)
- Install vapoursynth-sub using brew
brew install vapoursynth-sub 

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

vapoursynth-sub is ready to use now!