brew 操作时一直停留在Updating Homebrew

  1:关闭自动更新，即在.bash_profile中添加如下语句

export HOMEBREW_NO_AUTO_UPDATE=true

 2：直接ctrl +c ,这样子可以直接跳过当前的更新(其实就是退出当前更新操作)

 3：镜像原因导致速度慢，直接更换镜像即可

#阿里巴巴镜像:
# 替换 brew.git 
cd "$(brew --repo)"
git remote set-url origin https://mirrors.aliyun.com/homebrew/brew.git
 
# 替换homebrew-core.git
cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
git remote set-url origin https://mirrors.aliyun.com/homebrew/homebrew-core.git

#中国科大镜像
# 替换 brew.git 
cd "$(brew --repo)"
git remote set-url origin https://mirrors.ustc.edu.cn/brew.git

# 替换homebrew-core.git
cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git

# 清华镜像
# 替换 brew.git 
cd "$(brew --repo)"
git remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/brew.git
# 替换homebrew-core.git
cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
git remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew-core.git

更换镜像之后需要执行: brew update



注：这是原来的镜像地址
# 1.brew.git
git remote set-url origin https://github.com/Homebrew/brew.git

# 2. homebrew-core.git
git remote set-url origin https://github.com/Homebrew/homebrew-core.git

4：更换镜像仍旧无法解决的 执行brew update-reset  之后在brew update