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Today I decided to install Ubuntu on my MacBook Pro (mid 2012). As soon as the install process finishes after rebooting the system, I have this screen which tells me that there is no operating system installed.

I tried several ways and several medias (DVD, USB-stick), but I always have the error message in the end.

Note: I've tried to install Ubuntu 12.10 and Ubuntu 13.04, but both have the same error.

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Have you tried Boot-repair?? –  Saurav Kumar Oct 15 '13 at 14:40
Does this page help you? –  MadMike Oct 15 '13 at 15:05
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