Unable to boot into Ubuntu 13.04 on Mac Today I decided to erase OS X and install Ubuntu - unfortunately something went wrong and now I am asking this question on live mode on Ubuntu.

So basically all I did was create a bootable USB stick from OS X, restarted, then held down ⌥ alt/option, choosed the stick, installed Ubuntu and erased OS X.

All was good, and after installion it said "successful installation" and restarted the computer. I did that, and a blinking question mark appeared on the screen. My MBP could not find any bootable partition.

Any idea what can I do to get Ubuntu up and running?

By the way, I want to point out there is no OS X partition left on my drive - I didn't use any kind of program for dual boot, since I wanted to install OS X on another physical drive.
You can't simply install Ubuntu on your internal drive, because Apple's EFI and GRUB (the bootloader) don't get along.

You will also need an EFI bootloader, like rEFInd (a fork of rEFIt):


  rEFIt is a boot menu and maintenance toolkit for EFI-based machines like the Intel Macs. You can use it to boot multiple operating systems easily, including triple-boot setups with Boot Camp. It also provides an easy way to enter and explore the EFI pre-boot environment. Source: The rEFIt Project