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I downloaded the iso file of Ubuntu 11.04 (32 Bit) from Ubuntu download page and followed the instruction of creating Bootable USB Memory Card. from the same download page (http://www.ubuntu.com/download/ubuntu/download).

But after 9th Step i.e. executing the following command 

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

Mac could not detect the USB Memory Card. I have to format the Memory Card again.

Here is a configuration I am trying 1. Mac OSX 10.6.8 2. Ubuntu 11.04 32 Bit iso installation (I Created dmg file as per steps)

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  • I have the same problem. When I started my Mac holding the alt ley pressed I could not seen my USB drive. I have done all steps exact like in the tut. What I'm doing wrong?
    – user263265
    Mar 29, 2014 at 12:31

2 Answers 2

Reset to default
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The "error" you are getting is actually correct. Mac OS X cannot read the ext* family of file systems - it doesn't have the drivers. So after the dd, you can eject the USB and carry on.

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  • what i understand is the usb stick is bootable but it is not recognized by MAC. If this is right then how can I boot ubuntu from usb stick on MAC
    – Vishal Kardode
    Jan 25, 2012 at 4:52
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As jrg has said, it will not be readable on a mac without software such as OSXfuse. Even then the process of dd creates a usb that is read-only.

Simply reboot your mac holding down the left 'alt' key, and you should see your live usb displayed.

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