Install last vim version with homebrew:
brew update
brew install vim
Install the_silver_search (needed for ag plugin):
brew install the_silver_searcher
Install Monaco patched font.
Install fzf:
brew install fzf
# To install useful key bindings and fuzzy completion:
$(brew --prefix)/opt/fzf/install
Reload .vimrc, open vim and :PlugInstall to install plugins.
:GoInstallBinaries to setup vim-go plugin.