iDeneb 10.5.5 on external usbdisk not bootable

[shf10105]

hi everybody,

 

i've just installed iDeneb 10.5.5 on an external usb stick without any errors, but when rebooting, my system says, the disk wouldnt be bootable. My BIOS is capable of booting from external usb disks in general, i guess i forgot something when installing.

 

I have read something about osx86tools, but dont know how to run it (without a running os x installation). Can i somehow boot iDeneb with grub?

 

Thanks in advance