I am using Homebrew Vim from MacOS Terminal. The problem I am having now is to copy in vim to System Clipboard. I follow the guide online, which told me to use "+y after selection texts in visual mode. However, when I hit the corresponding keys on "+y, the system responds with a sound indicating that such key combination is illegal. What am I doing wrong?
I did what is suggested. Here is what my dot file looks like:
 set runtimepath+=~/.vim_runtime
 source ~/.vim_runtime/vimrcs/basic.vim
 source ~/.vim_runtime/vimrcs/filetypes.vim
 source ~/.vim_runtime/vimrcs/plugins_config.vim
 source ~/.vim_runtime/vimrcs/extended.vim
 try
 source ~/.vim_runtime/my_configs.vim
 catch
 endtry
 " Define Key Mapping
 inoremap jj <Esc>
 set clipboard=unnamedplus
 " Run Python file with one command
 nnoremap <buffer> <C-M> :exec '!python' shellescape(@%, 1)<cr>
 "YouCompleteMe virtual env config
 let g:ycm_global_ycm_extra_conf = '~/.vim/.ycm_extra_conf.py'
Further, the :reg does not show the "+ or "* registry.