The vimtex-faq-zathura-macos installing zathura on mac section contains now outdated install commands for zathura, particularly
brew install girara --HEAD
brew install zathura --HEAD --with-synctex
should be changed to
brew install girara
brew install zathura --with-synctex
as the --HEAD install from homebrew-zathura fails and serves no purpose anymore, as OSX native integration is stable already