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?
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.