目录

1.Homebrew命令报错

2.问题分析

3.解决方法

1.Homebrew命令报错

安装 nasm的时候突然报错了，报错信息如下

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 /Library/Ruby/Site/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'

7: from /Library/Ruby/Site/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)

所有的命令，好像都失效了

2.问题分析

造成这个 Homebrew 失效的原因可能是 Mac 在升级成 Big Sur 系统后（我的是 macOS Big Sui Version 11.4），旧版本的 Homebrew 不适配了

3.解决方法

网上查了下最新版的 Homebrew 已经解决了这个错误，所以 Homebrew 更新到最新的版本就可以了

更新指令

brew update-reset

brew update-reset

Homebrew更新完成之后，我们再再执行 brew -v 看看

完美执行了，说明现在Homebrew是正常的了，可以正常使用了

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