[ubuntu] Dual Boot OSX 10.8

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http://ubuntuforums.org – Hy, First of all, best wishes for the new year. I have the last Imac 21.5 inches, 2.7 Quad Core, OSX 10.8. I'd like to Dual boot on it: I applied exactly that recipe: http://www.ubuntu.com/download/help/...ick-on-mac-osx Because, thanks to the "new Imac" you even cannot use a CD to boot on it... Anyway, no problem with it, worked perfectly. The tricky stuff comes when I'm rebooting on the usb, I can "see" my usb key named "windows", I ask to boot on it, then I got this screen: http://doc.ubuntu-fr.org/_detail/ins...ck1.png?id=efi Then a black screen wit (Hardware)