I installed Ubuntu on dual boot on MacOS using rEFIt. Then, when I did not expect it, the Linux System stoped working, I decided to reboot the computer with MacOS when, for my surprise, everything (included MacOS) was erased. Why could this happen? How can I create correctly this dual boot on MacOS?
Originally asked by fqlenos on Stack Exchange (superuser) (CC BY-SA 4.0).
