I wasn't sure whether to post this in the photography or MacBook section (so I'll try both if I get no luck here). So I decided to reformat my MacBook Pro, because it has been becoming quite laggy lately due to all the useless stuff I have installed (and well I'm also in the need of a new harddrive). I have copied most of my files and everything I need onto an external harddrive. However, I don't know how to copy my photos in Aperture and also my Aperture app. Should I just copy it normally or will I have problems authenticating it after my reformat? Also, the last time I did something like this, most of my photos lost the editing I did to them :s (I keep the raws). I do have a timemachine backup in case it goes completely wrong, but would rather get it right the first time. Hope my post makes any sense and that someone here can help me.