Can't convert iso to img on mac

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?

4 Answers

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.

Try this command,

hdiutil convert -format Rdxx -o ubuntu-12.10-desktop-amd64.img ubuntu-12.10-desktop-amd64.iso 

Use Rdxx instead of UDRW.

Find the DMG file in finder and rename it to remove the trailing "dmg" extension. (Finder will ask you if you're sure. You are.)

Once you've done that, everything else will work as expected.

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.