Errno :: EACCES：运行Bundle Install时，权限被拒绝@ rb_sysopen错误

当我运行Bundle Install时，我收到以下错误：

mark$ bundle install Fetching gem metadata from https://rubygems.org/........... Fetching version metadata from https://rubygems.org/... Fetching dependency metadata from https://rubygems.org/.. Resolving dependencies... Using builder 3.2.2 Using ffi 1.9.14 Using gherkin 4.0.0 Using cucumber-wire 0.0.1 Using diff-lcs 1.2.5 Using multi_json 1.11.2 Using multi_test 0.1.2 Using rubyzip 1.2.0 Using websocket 1.2.3 Using bundler 1.11.2 Using childprocess 0.5.9 Using cucumber-core 1.5.0 Installing selenium-webdriver 2.53.4 Errno::EACCES: Permission denied @ rb_sysopen - /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/selenium-webdriver-2.53.4/CHANGES Using cucumber 2.4.0 An error occurred while installing selenium-webdriver (2.53.4), and Bundler cannot continue. Make sure that `gem install selenium-webdriver -v '2.53.4'` succeeds before bundling. 

任何帮助如何解决这个问题将不胜感激。