Hello i am about o buy a Macbook Air 2012 . I am a windows guy many years and i would like to see the osx and apple products. To the question: i will mainly use office suite for college. if i create/modify a file for example doc,docx ,ppt on W7 will i be able to open it in OS X ? and the reversed. or i will have to make something in order tha to be done ?