我今天在我的 mac 上安装了 Ruby on Rails 以及 Gems 和 MYsql。我正在尝试遵循 lynda.com 教程，但遇到了困难。当我尝试运行 Rails 服务器时，由于某种原因它没有加载 WEBrick。这是我得到的错误：
/Library/Ruby/Gems/1.8/gems/railties-3.0.5/lib/rails/script_rails_loader.rb:11: warning: Insecure world writable dir /usr/local in PATH, mode 040777
/Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:136: warning: Insecure world writable dir /usr/local in PATH, mode 040777
/Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle: dlopen(/Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.18.dylib (LoadError)
Referenced from: /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle
Reason: image not found - /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle
from /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2.rb:7
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:68:in `require'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:68:in `require'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:66:in `each'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:66:in `require'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:55:in `each'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:55:in `require'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler.rb:120:in `require'
from /Users/nutanpatel/Sites/simple_cms/config/application.rb:7
from /Library/Ruby/Gems/1.8/gems/railties-3.0.5/lib/rails/commands.rb:28:in `require'
from /Library/Ruby/Gems/1.8/gems/railties-3.0.5/lib/rails/commands.rb:28
from /Library/Ruby/Gems/1.8/gems/railties-3.0.5/lib/rails/commands.rb:27:in `tap'
from /Library/Ruby/Gems/1.8/gems/railties-3.0.5/lib/rails/commands.rb:27
from script/rails:6:in `require'
from script/rails:6
关于我能做什么有什么想法吗？请帮忙 - 我被困住了！
我做了rails -v 并且我使用的是3.0.5：
rails -v
/Library/Ruby/Gems/1.8/gems/railties-3.0.5/lib/rails/script_rails_loader.rb:11: warning: Insecure world writable dir /usr/local in PATH, mode 040777
/Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/runtime.rb:136: warning: Insecure world writable dir /usr/local in PATH, mode 040777
Rails 3.0.5
顺便说一句：我试着去做这件事sudo chmod go-w /usr/local/bin但这并没有解决任何问题。
我这样做的原因是：警告：路径中不安全的世界可写目录 /usr/local/bin，模式 040777
我强烈建议您使用rvm安装ruby并重试：
- http://rvm.beginrescueend.com/
OS X 附带的默认 ruby 存在许多问题。安装 RVM 时，您可以轻松获得 ruby 的全新安装。
请务必仔细阅读安装说明，尤其是关于在您的计算机中插入一行的最后一点.bashrc.
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