So, I'm really excited to get my hands on my first Linux system. I did all the steps required for downloading Ubuntu, until the step with creating a bootable USB stick, wher eI have a problem.

I followed the steps in the link: http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-mac-osx and I arrived at step 8, where it says:

Execute sudo dd if=/path/to/downloaded.img of=/dev/rdiskN bs=1m

Here is what I typed in:

sudo dd if=ubuntu-14.04-desktop-amd64+mac.img.dmg of=/dev/rdisk1 bs=1m

after waiting for 3 minutes and a half (or 210.289801 seconds) of data transfer (of 1008730112 bytes) I get a window with the message:

The disk you inserted was not readable by this computer

with options to: "Initialize...", "Ignore", or "Eject"

Q: How do I solve this problem? (Bonus: Where did all the data go?)

2 Answers 2


If u have an iso, try converting it into UDRW format. The following command will help u convert:-

hdiutil convert -format UDRW -o destination_file.img source_file.iso

U will get a .img.dmg

Then, clear all the data on your USB device and copy the image to the USB stick. later, try this

$ dd if=destination_file.img.dmg of=/dev/disk2 bs=1m

wait till it completes and then eject using,

$ diskutil eject /dev/disk2

Hope this helps! :)

  • The first step I have done, since it's in the link I mentioned.. but what do you mean by "$" in your comment?
    – aaldilai
    Jun 25, 2014 at 20:50
  • oh don't worry about that, u don't have to consider "$". u type just the rest of the command :) for instance, when you open a terminal, you start typing in front of "xyz$", so thats what $ about
    – Siddhartha
    Jun 26, 2014 at 2:33
  • Anyways.. That didn't seem to work. First dd doesn't work on it's own, it only works when ai put sudo before it. Secondly, i was using the same command with if=location/of/file/in/downloads.img.dmg but since u mentioned that i should put the file in the USB, i guessed you meant if=location/in/disk. Well the sudo dd command doesn't work if the disk is not unmounted, and when I unmount it, the file in the USB cannot be read. So i can't follow the steps you mentioned
    – aaldilai
    Jun 26, 2014 at 8:36

I finally found the answer, and it seems like the only solution on the whole internet (I've suffered).

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