I did an upgrade of 11.04 into 13.04 and it has failed miserably.
Now I want a fresh install, hopefully saving my /home directory. I use centos on my other machine and do not have access to a macos anymore.
What I was able to figure out some time ago (sorry no links):
I need to create a dmg image of an ordinary .iso install image. libdmg-hfsplus will do it it seems.
I should copy this onto a vfat-formatted pendrive partition with dd while the pendrive is not mounted.
When putting the pendrive into the macbook, I should hold ctrl while booting and then macbook will allow to boot from the pendrive.
I did not succeed so I ask: are the above correct and sufficient?