I have been spending some time looking for my problem. I have reinstalled Vim on my mac for several times using brew. The vim --version command show that +clipboard and +xterm_clipboard, so I should be good to go. However, when I type "+yy or "*yy inside vim, the :reg command show that the register changed to the current line, but when I do paste outside vim, the content still did not change. Everything in vim I can tolerate to trade off its super flexibility, however, this copy/paste which is frequently used but extremely difficult in vim really driving me crazy...
