Well here I am - I am already on to Mavericks - but I am itching to do a clean install. My question is - though I have a time machine backup I do not want system files to be restored - otherwise - it is the same unclean install with the system restored. So the question is can I just restore the data files selectively - and if I cannot do it then can I backup files selectively ? the point is I do not want to wish some stupid but a file that I cannot do without... So what all do I do ? What files do I backup ? and How ?