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I'm following the official instructions for burning an Ubuntu image on a USB stick from a macbook pro.

Step 8 when trying

$ sudo dd if=/path/to/downloaded.img of=/dev/rdisk1 bs=1m

I'm getting (after having typed my root password)

dd: /dev/rdisk1: Permission denied

Why is this happening?

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  • Is the drive /dev/rdisk1 mounted? I have no experience of OS X, but in linux you often have to unmount a device before you can do some specific things.
    – R110
    May 28, 2013 at 19:18

1 Answer 1

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I had that same thing happen to me. There was a write-protect switch on the flash drive I was using. Once I switched it to enable writing onto the disk, it worked.

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