Mac安装Oh My Zsh 报错！ unable to access 'https://github.com ..........

lijiandembp:~ lijian$ sh -c "$(curl -fsSL https://raw.github.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"
Cloning Oh My Zsh...
Cloning into '/Users/lijian/.oh-my-zsh'...
fatal: unable to access 'https://github.com/robbyrussell/oh-my-zsh.git/': Proxy CONNECT aborted
Error: git clone of oh-my-zsh repo failed

GIthub我自己是能上去的，网上说什么代理的问题，搞不太懂，我尝试着设置了代理的IP，依然没用，以前安装没这些事情，有人遇到过吗？