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grub2 with dual boot Ubuntu 12.04 + OS X 10.8

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I have a primary Ubuntu disk, which has a MBR,

where the grub2 bootloader resides.

On another disk I have a OS X 10.8 installation.

The only way to boot into OS X is to choose the

bootdisk with F12 from the BIOS menu.

I would like to start OS X from the grub bootmenu.

There are already two generated entries for 32bit

and 64 bit, but neither of them works. Choosing

one of these entries ends with a black screen.


The OS X disk shows the following partitions:


Partition Table: gpt

Number Start End Size File system Name Flags

1 20.5kB 210MB 210MB fat32 EFI System Partition boot

2 210MB 400GB 400GB hfs+ Mountain Lion


Can anyone tell me what exactly I have to put into

/etc/grub.d/40_custom in order to get a working entry

in my grubmenu for OS X ?

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Grub bootloader never boot your OSX

Need to use Chameleon on OSX HDD for Boot Linux(reverse option will-Sory) :wallbash:

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booting OS X shows me a boot-screen with three icons:

OS X, Windows and Linux. Starting OS X works.

Hitting on the Linux icon starts Windows and

hitting on the Windows icon crashes.

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Your Chameleon version is?Or you use Chimera?

try this Bootloader,work like charm with every version OSX-10.6xxx-10.7xxxx-10.8xxxx

I use perfectly Tripple boot from him :thumbsup_anim:

Chameleon RC5 752 Lion+Snow.pkg.zip

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