title: Upgrade a ubuntu virtual machine to OpenGl 4
body: <p>I need OpenGL 4 for a classes of visual computing and i have Mac Os X which doesn't allow to use a version higher than 2.1. I've installed a virtual machine with ubuntu but i can't upgrade it higher than openGL 3.3 .</p>
  
  <p>Consulting this topic <a href="https://stackoverflow.com/questions/18771347/opengl-3-3-ubuntu-virtual-machine">OpenGL 3.3 Ubuntu (Virtual Machine)</a>
  I understand that i had to install the fglrx drivers on my virtual machine but i don't know how i can get through. 
  I've tried to "sudo apt-get install fglrx" but it failed.
  I don't know what to tried i'm a kind of noob in visual computing.</p>
  
  <p>edit: my mac is compatible with OpenGL 4.1</p>