I know this question has already been asked but I didn't find any answer to my problem or working tutorial.
I'm on a 2010 white macbook and I would like to install ubuntu as my main OS. I have no usb stick or CD, but I have an external hard drive with all my data. I don't want to lose it. I tried to partition it but I can't boot on it.
I'm on Mac OS Sierra and I don't know how to do !
Thank you for your answers :)
