chain boot error, can't fix MBR, can't load Lion

indows Boot Manager
identifier {9dea862c-5cdd-4e70-acc1-f32b344d4795}
device partition=C:
description Windows Boot Manager
locale en-us
inherit {7ea2e1ac-2e61-4728-aaa3-896d9d0a9f0e}
default {9e81ff89-7e48-11e1-ae47-005056c00008}
resumeobject {9e81ff88-7e48-11e1-ae47-005056c00008}
displayorder {9e81ff89-7e48-11e1-ae47-005056c00008}
toolsdisplayorder {b2721d73-1db4-4c62-bf78-c548a880142d}
timeout 3
displaybootmenu Yes

Windows Boot Loader
identifier {9e81ff89-7e48-11e1-ae47-005056c00008}
device partition=C:
path \Windows\system32\winload.exe
description Windows 7
locale en-us
inherit {6efb52bf-1766-41db-a6b3-0ee5eff72bd7}
osdevice partition=C:
systemroot \Windows
resumeobject {9e81ff88-7e48-11e1-ae47-005056c00008}
nx OptIn
detecthal Yes

Real-mode Boot Sector
identifier {878b1c7a-19e8-11e2-998b-005056c00008}
device partition=C:
path \NST\nst_mac.mbr
description Mac OS X
As you can see i'm dualing with Windows 7 and lion. I recently added another HFS+ partition to my drive (was out of space on lion) and now when i try to boot to lion i get this error: "chain boot error". I tried recreating the MBR with easybcd, removing entries, creating new ones. The error stays the same. If i try to add EFI mac entry my computer just restarts.



Mostly Harmless
Staff member
Your PC restarts in the process of adding the EFI entry in EasyBCD?!
No, sorry for the confusion.
Adding the entry is not the problem.
When i select the EFI entry from the boot menu i see some sort of chameleon boot screen and then my computer restarts.


Mostly Harmless
Staff member
If you're getting to Chameleon then rebooting, it sounds like EasyBCD has done its job.
You need to configure Chameleon and add whatever modules it is missing. We don't provide support on that.
Well, I googled my problem and someone was suggesting using tboot to solve the chain boot error so I replaced the nst_mac.mbr easybcd created with tboot (renamed it to nst_mac.mbr of course) and Lion is booting just fine, the problem there is that i get another boot screen that asks me to select the OS i want to load.

That's way i believe that Easybcd is don't directing to the right partition while creating a new MBR entry.
Like i said above i recently created another HFS+ partition. Maybe for some reason Easybcd is directing to disk 1,2 instead of 1,3?
Maybe i'm way off, idk.
Last edited:

Mak 2.0

Staff member
EasyBCD and the support provided for it only go as far as adding and Entry for OS X on a PC. Since it can only be done with a Developer Kit legally, we dont fully provide support on how to get OS X working on a PC. Once you get the entry added and it does its job, the rest is out of our hands.
I fully understand that but until now I used only MBR entry and right now doing so gives me " chains boot error " while another modified MBR is working. There for EasyBCD doesn't get the job done for me.