can any one suggest what to do. I have the latest logic and os for mac and it has stopped giving me the option of a 64 bit start up I have installed Reason 5 duo, the complete spectrasonics team and melodyne recently and I dont think they can disable that option in logic ? I open my applications window , choose get info and where the option to choose 64 bit,used to be, has now got open using rosetta instead. What have i done?