Hi guys. Since I couldn't find a solution in the other threads, I'm asking here for some help in updating my OSX installation to 10.9. Right now, I'm on 10.8.5 and I got the GM dmg, so I'm trying to update. I copied the "app" from the dmg to another partition and launched the installer, but I can't select the partition for the installation because of the MBR error.
I also tried creating a USB installer with myhack, but I don't have the "Create OSX installer" option in the menu. The USB stick is properly formatted and partitioned, so that's not the problem. I did managed to "build" the stick using another method, with Chameleon and everything, but I can't boot from it, the screen flashes (black) and there's no disk activity.
So my question is: what can I do to update? Obviously, without wiping the HDD and repartitioning as GUID. Thank you.