No Boot without unibeast !

Hi everyone !
I have a little problem with booting and installing the drivers from multibeast, I've followed very well the tutoriel but after installing the drivers from multibeast and rebooting the system there is no boot (and no boot error) and it go directely to windows 7, and when i boot with unibeast it works but it's like nothing changed ! no drivers !

Maverick and Windows 7 are in different HDD
AHCI is activated
I tried to boot directely from the HDD of Maverick but it doesn't work (windows7 boots)

my configuration :
asus z87m-plus
i5 4670k
hd 7870
2*4GB 1866

thanks !

What did you exactly install from multibest?

this sounds like it is not a big problem.

I just followed that and rebooted but nothing happened
http://www.tonymacx86.com/attachments/70254d1382222090-mb3.png.html

nikzebi said:

I just followed that and rebooted but nothing happened
http://www.tonymacx86.com/attachments/70254d1382222090-mb3.png.html

Click to expand...

It sounds like you do not have the correct boot drive selected in the BIOS/UEFI. Does your motherboard offer a boot menu where you can select what drive you want to boot from? Is Mavericks on a drive of its own or are you using a multipartition drive?

Maverick and Windows 7 are in different HDD
AHCI is activated
I tried to boot directely from the HDD of Maverick but it doesn't work (windows7 boots)

Click to expand...

it's like there is no boot loader, I can reach Maverick only with unibeast, if it just that, it's not a problem for me (booting from unibeast) but the drivers ! it won't install too

some news

I've deleted the boot.plist and reinstall them with multibeast : NO
I've tried multibeast 6.2.1 : NO
I've unpluggded all my HDD and let only one then I reinstalled mavericks : NO

when I unplugg the USB unibeast I have a black screen and a rebooting to the bios

hi (and sorry for the triple post)

I've followed that and it worked but I still have a problem with the drivers ... especially the ethernet one