Chef/Vagrant issue

gistfile1.rb

Macbook Pro:chef-guide tibbon$ rake start
vagrant up
There was an error while executing `VBoxManage`, a CLI used by Vagrant
for controlling VirtualBox. The command and stderr is shown below.

Command: ["--version"]

Stderr: dyld: Library not loaded: /Applications/VirtualBox.app/Contents/MacOS/VBoxRT.dylib
  Referenced from: /Applications/VirtualBox.app/Contents/MacOS/VBoxManage
  Reason: no suitable image found.  Did find:
  /Applications/VirtualBox.app/Contents/MacOS/VBoxRT.dylib: truncated fat file.  file length=4587520, but needed slice goes to 7299536

rake aborted!
Command failed with status (1): [vagrant up...]
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/file_utils.rb:53:in `block in create_shell_runner'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/file_utils.rb:45:in `call'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/file_utils.rb:45:in `sh'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/file_utils_ext.rb:37:in `sh'
/Users/tibbon/Code/chef-guide/Rakefile:91:in `block in <top (required)>'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/task.rb:246:in `call'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/task.rb:246:in `block in execute'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/task.rb:241:in `each'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/task.rb:241:in `execute'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/task.rb:184:in `block in invoke_with_call_chain'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/task.rb:177:in `invoke_with_call_chain'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/task.rb:170:in `invoke'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/application.rb:143:in `invoke_task'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/application.rb:101:in `block (2 levels) in top_level'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/application.rb:101:in `each'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/application.rb:101:in `block in top_level'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/application.rb:110:in `run_with_threads'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/application.rb:95:in `top_level'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/application.rb:73:in `block in run'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/application.rb:160:in `standard_exception_handling'
/Users/tibbon/.rvm/gems/ruby-1.9.3-p194/gems/rake-10.0.4/lib/rake/application.rb:70:in `run'
Tasks: TOP => start
(See full trace by running task with --trace)
Macbook Pro:chef-guide tibbon$