我有 catalina OS 10.15.7 和 XCode 版本 12.4 (12D4e) 我正在尝试使用 gem 安装 cocoapods：
sudo gem install cocoapods
我收到此错误：
ERROR: While executing gem ... (Gem::FilePermissionError)
You don't have write permissions for the /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/gems/2.6.0 directory.
解决这个问题真是一场噩梦。我尝试使用brew install。Brew 能够安装它。但吊舱不起作用。当我使用简单的命令时，例如
pod init
or
pod -v
我收到此错误：
Traceback (most recent call last):
16: from /usr/local/Cellar/cocoapods/1.11.2_1/libexec/bin/pod:23:in `<main>'
15: from /Library/Ruby/Site/2.6.0/rubygems.rb:285:in `activate_bin_path'
14: from /Library/Ruby/Site/2.6.0/rubygems.rb:285:in `synchronize'
13: from /Library/Ruby/Site/2.6.0/rubygems.rb:286:in `block in activate_bin_path'
12: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1369:in `activate'
11: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `activate_dependencies'
10: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `each'
9: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1405:in …