[xubuntu-users] zapped boot info

[Wes James]

I have a mac pro (2010?) that is set up with xubuntu 12.04.  The first disk
in the system has windows, the second has os X and xubuntu / and swap
partitions.  The user upgraded to maveriks, but now when the system start
you can see Windows, Xubuntu and OS X in the refit boot menu.  When you
select Xubuntu, it boots in to windows.  I booted from the super grub disk
( http://www.supergrubdisk.org/ ) and can select the Xubuntu option and it
boots fine.  I've looked in gparted to see where the boot loader might have
been for xubuntu, but I can't tell.  There is a /boot folder so I think the
system was partitioned in to / and swap only.  Any suggestions on getting
xubuntu booting again.  I've tried update-grub2, but that doesn't help.
 I've looked at using the grub-install, but I'm not sure what parameters
I'd use to run it.  I tried:

sudo grub-install /dev/sda

but it says it can't do that on a GPT partition. Same with /dev/sdb.

Thanks,

-wes
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