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I tried searching the Internet, but could not find a decent tutorial explaining how to create a bootable Ubuntu Linux (10.04) USB installation that could be run not only on a PC but also on Macs and MacBook Pros. In addition, I tried refit, but ended with "Missing operating system" error.

Here is basically the layout of my bootable under PC Ubuntu USB drive (using MBR): Partition 1 (ext3, bootable) - Ubuntu Linux 32 bit, contains also grub2 bootloader. Partition 2 (ext3) - Ubuntu Linux 64 bit. Partition 3 (fat32) - contains data.

What would be the best way to enable this drive to boot under Mac OS X? And if refit has to be used, could I simply have one more partition on the USB drive containing it?


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I've been able to boot from a 2GB USB stick on my Macbook Pro and a PC by following the instructions on Ubuntu's download page:

Just choose the version options you want on the Download section and on the Burn your CD or create a bootable USB stick section, pick "USB stick" and the OS you're using to download & create the bootable stick. Finally, click the orange "Show me how" button to see the directions for that specific senario.

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Well, this is for ubuntu 8, but I’m sure it’s more or less the same. Install Ubuntu on Mac Pro

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I don't believe this is what he asked for, this installs on the hard drive. The OP wanted a bootable USB drive. – Rich Homolka May 12 '11 at 23:25

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