我想使用测试驱动开发（TDD）创建一个rails应用程序，所以我写了
rails new myproject -T
然后我在 gemfile 中添加了这些代码行
group :test, :development do
gem 'turn'
gem 'rspec-rails'
gem 'capybara'
gem 'guard-rspec'
gem 'growl_notify'
end
所以我尝试安装捆绑包，但捆绑时出现此错误
Installing rb-appscript (0.6.1) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/share/ruby-rvm/rubies/ruby-1.9.3-p125/bin/ruby extconf.rb
extconf.rb:44: Use RbConfig instead of obsolete and deprecated Config.
create /var/lib/ruby-rvm/gems/ruby-1.9.3-p125/gems/rb-appscript-0.6.1/src/osx_ruby.h ...
create /var/lib/ruby-rvm/gems/ruby-1.9.3-p125/gems/rb-appscript-0.6.1/src/osx_intern.h ...
creating Makefile
make
Makefile:226: warning: overriding commands for target `/usr/share/ruby-rvm/gems/ruby-1.9.3-p125/gems/rb-appscript-0.6.1/lib'
Makefile:224: warning: ignoring old commands for target `/usr/share/ruby-rvm/gems/ruby-1.9.3-p125/gems/rb-appscript-0.6.1/lib'
compiling src/rbae.c
src/rbae.c:13:27: fatal error: Carbon/Carbon.h: No such file or directory
compilation terminated.
make: *** [rbae.o] Error 1
Gem files will remain installed in /usr/share/ruby-rvm/gems/ruby-1.9.3-p125/gems/rb-appscript-0.6.1 for inspection.
Results logged to /usr/share/ruby-rvm/gems/ruby-1.9.3-p125/gems/rb-appscript-0.6.1/./gem_make.out
An error occured while installing rb-appscript (0.6.1), and Bundler cannot continue.
Make sure that `gem install rb-appscript -v '0.6.1'` succeeds before bundling.
所以我尝试手动安装 gem
gem install rb-appscript -v '0.6.1'
我也遇到了类似的错误
Building native extensions. This could take a while...
ERROR: Error installing rb-appscript:
ERROR: Failed to build gem native extension.
/usr/share/ruby-rvm/rubies/ruby-1.9.3-p125/bin/ruby extconf.rb
extconf.rb:44: Use RbConfig instead of obsolete and deprecated Config.
create /var/lib/ruby-rvm/gems/ruby-1.9.3-p125/gems/rb-appscript-0.6.1/src/osx_ruby.h ...
create /var/lib/ruby-rvm/gems/ruby-1.9.3-p125/gems/rb-appscript-0.6.1/src/osx_intern.h ...
creating Makefile
make
Makefile:226: warning: overriding commands for target `/usr/share/ruby-rvm/gems/ruby-1.9.3-p125/gems/rb-appscript-0.6.1/lib'
Makefile:224: warning: ignoring old commands for target `/usr/share/ruby-rvm/gems/ruby-1.9.3-p125/gems/rb-appscript-0.6.1/lib'
compiling src/rbae.c
src/rbae.c:13:27: fatal error: Carbon/Carbon.h: No such file or directory
compilation terminated.
make: *** [rbae.o] Error 1
Gem files will remain installed in /usr/share/ruby-rvm/gems/ruby-1.9.3-p125/gems/rb-appscript-0.6.1 for inspection.
Results logged to /usr/share/ruby-rvm/gems/ruby-1.9.3-p125/gems/rb-appscript-0.6.1/./gem_make.out
所以有什么建议我现在能做什么？