解决：fatal: unable to access ‘https://github.com/Homebrew/brew/’: Error in the HTTP2 framing layer
fatal: unable to access ‘https://github.com/homebrew/brew/‘:
1
更新了新的系统，安装homebrew的时候老失败。
解决方案：
git config --global --unset http.proxy
git config --global --unset https.proxy
fatal: unable to access ‘https://github.com/Homebrew/brew/‘: Error in the HTTP2 framing layer
原文：https://www.cnblogs.com/liang715200/p/15187144.html