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I followed the instructions here and I got a dmg instead. This is what I entered:

cd Desktop
hdiutil convert ubuntu-12.10-desktop-amd64.iso -format UDRW -o ubuntu-12.10-desktop-amd64.img

Then it gave me a dmg. What should I do?

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Can you point where did you get that instructions? – Jorge Suárez de Lis Jan 15 at 23:22

2 Answers

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From that very same documentation:

Note: OS X tends to put the .dmg ending on the output file automatically.

It seems it's not a problem. Just continue to the next steps, and when prompted for the file name, be sure to provide the correct one, with the .dmg extension. That's all.

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It still says 'no mountable file systems' when I click on the new file. Is this a problem? Should I just continue? – Skylar Ruloff Jan 16 at 0:10
I don't know, I'm not a Mac OS X user. The instructions don't say a thing about clicking on the file, so I'd continue without worrying. – Jorge Suárez de Lis Jan 16 at 0:44
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An .iso file and an .img file can normally be used interchangeably with little or no effect. Just rename the file so that it includes a .img extension.

cp ubuntu-12.10-desktop-amd64.iso ubuntu-12.10-desktop-amd64.img

If you get stuck, you can burn an image to DVD, as well as a thumb-drive.

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When I try to open it, it says 'no mountable file systems' I tried renaming it and it doesn't work. I tried entering the command you suggestion and it didn't do anything. I am just trying to make a usb out of it so I can try it out. If it is this frustrating just to download then I might just say f- it and stick with osx – Skylar Ruloff Jan 15 at 23:37
I'd try the DVD route before USB. See this to see why. – Chan-Ho Suh Jan 16 at 0:07

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