Mac 升级 Big Sur 系统后 Homebrew 命令错误以及找不到其他命令工具

错误复现

$ brew 
Traceback (most recent call last):
        11: from /usr/local/Homebrew/Library/Homebrew/brew.rb:23:in `<main>'
        10: from /usr/local/Homebrew/Library/Homebrew/brew.rb:23:in `require_relative'
         9: from /usr/local/Homebrew/Library/Homebrew/global.rb:37:in `<top (required)>'
         8: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
         7: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
         6: from /usr/local/Homebrew/Library/Homebrew/os.rb:3:in `<top (required)>'
         5: from /usr/local/Homebrew/Library/Homebrew/os.rb:21:in `<module:OS>'
         4: from /usr/local/Homebrew/Library/Homebrew/os/mac.rb:58:in `prerelease?'
         3: from /usr/local/Homebrew/Library/Homebrew/os/mac.rb:24:in `version'
         2: from /usr/local/Homebrew/Library/Homebrew/os/mac.rb:24:in `new'
         1: from /usr/local/Homebrew/Library/Homebrew/os/mac/version.rb:26:in `initialize'
/usr/local/Homebrew/Library/Homebrew/version.rb:368:in `initialize': Version value must be a string; got a NilClass () (TypeError)

解决方法

Big Sur系统与旧版 Homebrew 不适配,更新到新版本 Homebrew 即可使用:

首先执行, 更新重置命令:

$ brew update-reset

完成后执行:

$ brew update

最后, 退出终端重新打开, 即可恢复 brew 命令以及所有之前安装过的命令工具.