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I want to make a bootable USB disk for installing Ubuntu from Mac. When I format the USB disk from terminal, i use

$ diskutil eraseDisk HFS+ KINGSTON GPTFormat /dev/disk1

But there are other available options for the partition, like APMFormat and MBRformat. So which should work for Ubuntu?

I did some search, here's a link that discusses these three formats. Here's a quote:

But if you want to boot OS X (intel) from it, then you need GPT

If you want to boot OS X (PPC) from it, then you need APT

If you want to boot Linux, Windows, BSD, or other OS that boots from the BIOS then you need MBR.

I'm a little confused here; any suggestions would be helpful!

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You don't need to format it, instead just use the dd command to write the ISO to the USB. Something like dd if=/path/to/ubuntu.iso of=/dev/disk# (use diskutil list to write it to the correct device, otherwise you could corrupt your main HDD or another drive if you type it incorrectly. –  nerdwaller Aug 19 '13 at 19:22

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