If you want to install ubuntu in Macbook pro. plese refer the following webpage
https://help.ubuntu.com/community/MacBookPro
be attention that, if you want to have the right resolution, download the driver from the nvidia offical site and don’t use the nvidia-current in apt-get, it will crash the GUI.
if you have installed nvidia-current and cannnot enter the GUI, just delete /etc/X11/xorg.conf and then type startx in the command window. then you will enter a GUI with low resolution interface. Then download the nvidia driver from official site and reinstall again.
Jing Conan Wang 