Re: [Mactel-linux-users] Booting From USB Drive

[cyberdork33 <cyb...@gm...>]

On Aug 25, 2009, at 2:13 PM, Geoffrey wrote:

> Stefan Monnier wrote:
>>>>> Is it possible to boot Linux from a USB drive without modifying  
>>>>> the Mac?
>>>> In theory, it is possible: all Intel Macs can boot from USB  
>>>> (AFAIK).
>>>> But the legacy BIOS in those Macs does not support booting from  
>>>> USB.
>>>> So you'll have to boot using EFI.
>>>> I've been trying to do that on-and-off, in the hope to get my  
>>>> trusty
>>>> "rescue USB key" to also work on my Macbook Pro, but until now I  
>>>> haven't
>>>> had much success, tho it seems that some people do get to boot  
>>>> Linux via
>>>> EFI on their Mac.
>>>> Any information about this would be welcome,
>>> I have used rEFIt for this purpose: http://refit.sourceforge.net/
>>
>> rEFIt doesn't boot Linux.  So it's not a solution to this problem.
>
> Um, unless I mis-understand what you're saying, that's not correct.   
> I'm
> booting Linux via rEFIt.  Or are you saying you can't boot Linux  
> from a
> USB device via rEFIt?

rEFIt doesn't "boot" Linux, it is just an interface to the standard  
Apple-supplied EFI... and it will not boot in legacy mode from USB or  
firewire. Therefore you have to boot Linux in EFI mode which requires  
GRUB-EFI or ELILO. I have only had success with GRUB-EFI.

http://grub.enbug.org/TestingOnMacbook

Lot's of testing info...
http://ubuntuforums.org/showthread.php?t=995704

>
>>> Just plug in the USB stick prior to booting and an additional icon
>>> will show up on the initial selection.
>>
>> What USB stick?  What do you need to put on it?
>>
>> This said, I have finally managed to get Grub2's EFI support to work.
>> Incidentally, I do use rEFIt on top of Grub2 (basically, I use  
>> rEFIt to
>> choose between Grub2-ia32 and Grub2-amd64, since rEFIt luckily uses
>> a fat-binary whereas Grub2 doesn't).
>>
>>
>>        Stefan
>>
>>
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>
>
> -- 
> Until later, Geoffrey
>
> Those who would give up essential Liberty, to purchase a little
> temporary Safety, deserve neither Liberty nor Safety.
>  - Benjamin Franklin
>
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