检查你的Ruby版本是否正确。如果不是，那就改变它。

这对我来说很管用:

$ rbenv global 1.9.3-p547
$ gem update --system

你为什么不这样做:

sudo gem update --system

这将以一种干净的方式修复MacOS Mojave和Catalina的问题:

brew install ruby

然后将GEM_HOME设置为您的用户目录。终端:

Bash: echo '#安装Ruby Gems到~/ Gems ' >> ~/.bashrc echo 'export GEM_HOME=$HOME/gems' >> ~/.bashrc echo 'export PATH=$HOME/gems/bin:$PATH' >> ~/.bashrc . txt 源~ / . bashrc 如果在Zsh上: echo '#安装Ruby Gems到~/ Gems ' >> ~/.zshrc echo 'export GEM_HOME=$HOME/gems' >> ~/.zshrc echo 'export PATH=$HOME/gems/bin:$PATH' >> ~/.zshrc . txt 源~ / . zshrc

我找到了这个无苏多尔宝石的指南:

Brew install rbenv ruby-build Sudo gem update—system 向.bashrc添加导出: export RBENV_ROOT="$(brew -prefix rbenv)" export GEM_HOME="$(brew -prefix)/opt/gems" export GEM_PATH="$(brew -prefix)/opt/gems" 最后将这个添加到~/.gemrc中: 宝石:- n / usr /地方/ bin Gem更新——system

安装gem或更新RubyGems失败，出现权限错误，然后输入此命令

sudo gem install cocoapods

该错误的原因是您没有以root用户登录终端。

如果你已经在终端类型的mac上启用了根用户

$ su

如果您没有root用户，您需要使用以下步骤启用它

From the Apple menu choose System Preferences…. From the View menu choose Users & Groups. Click the lock and authenticate as an administrator account. Click Login Options…. Click the “Edit…” or “Join…” button at the bottom right. Click the “Open Directory Utility…” button. Click the lock in the Directory Utility window. Enter an administrator account name and password, then click OK. Choose Enable Root User from the Edit menu. Enter the root password you wish to use in both the Password and Verify fields, then click OK.

更多内容请登录http://support.apple.com/kb/ht1528

在被困了几个小时后，至少它对我有用。