[Solved] Can't boot USB live Linux

[sentur]

I've created a USB live linux drive using unetbootin (tried both Linux Mint 17 and Clonezilla) but I can't get either of them to boot.

When starting my Hackintosh I press F12 to select the boot device and see UEFI: USB HDD and then select this. However it jumps straight into Clover. There's not drive to select other than my system SSD drive once in Clover.

I've got Clover installed and presume that maybe the issue is todo with UEFI in some way? I've been through my BIOS settings though and can't see anything obvious.

FYI: the reason I'm trying to use the Live USB is to clone my system drive onto a new bigger HDD. And so need to make sure OS X isn't running.

 

[sentur]

I followed this guide http://www.insanelymac.com/forum/topic/308914-guide-use-clonezilla-to-back-up-your-startup-disk/

And then realised that the USB had to be inserted into one of the USB ports on the back of my hackintosh (directly into the MOBO), rather than than one of the additional ones on the tower case.

In case that helps anyone in future.