运行命令brew install pip3，结果界面一直卡在Updating Homebrew...上，有两种解决办法

方法一：直接关闭brew每次执行命令时的自动更新（推荐）

vim ~/.bash_profile# 新增一行export HOMEBREW_NO_AUTO_UPDATE=true

方法二：替换brew源

cd "$(brew --repo)"git remote set-url origin https://mirrors.ustc.edu.cn/brew.git#替换homebrew-core.gitcd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.gitbrew update# 备用地址-1cd "$(brew --repo)"git remote set-url origin https://git.coding.net/homebrew/homebrew.gitbrew update# 备用地址-2cd "$(brew --repo)"git remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/brew.gitcd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"git remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew-core.gitbrew update

如果备用地址都不行，那就只能再换回官方地址了

#重置brew.gitcd "$(brew --repo)"git remote set-url origin https://github.com/Homebrew/brew.git#重置homebrew-core.gitcd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"git remote set-url origin https://github.com/Homebrew/homebrew-core.git