打開終端運行： ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
遇到：
Homebrew install issue: in `<main>': undefined local variable or method `“' for main:Object (NameError)
這個報錯請參考：
https://stackoverflow.com/questions/33510217/homebrew-install-issue-in-main-undefined-local-variable-or-method-for