kjeltring

perfect! thanks a million! followed your advice to make a DOS bootable usb and downgrade to A11, problem solved !

Thanks for the reply, i do have A12. my scenario is exacly like the Author`s exept that my computer is a brand New 6430S and it has never seen Windows before. i got the same speccs as specifyed in this thread. i still have the issue after trying the suggestions in this thread.

hey, tried reading through this thread to get this issue resolved. i found that "exchanging the MB" somehow solved this issue for you. so by MB do you mean Megabyte of video memory or Mellbook as you refer to in this last post ?(or did i completly miss something?? :S ). its my first time doing this install and im having a bit of a struggle. if you have a better description of what solved your problem it would be appreciated ! im at where you were, having the same speccs and OSX 10.9.2 , how ever i got a E6430S. thanks