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Wondering if anybody's done this before. So you know, it's a 2012 MBA with Mountain Lion... which means Boot Camp has pretty much been locked in to supporting Windows 7 only (from what Google tells me).

I've installed rEFIt, so that the Mac can boot into Linux distros.

I'm going to Ubuntu, I downloaded the latest iso, 64bit, and used hdiutil to convert it to a dmg file. I then use dd to copy the dmg over to a USB HDD.

When I boot up and load rEFIt, however, the ubuntu option isn't loading.

What am I doing wrong?