Like everyone else it seems I also just got a 12" iBook... I used to use macs all the time, but have been exclusively windows since somthing like OS6... OSX is pretty new to me and i'm pretty rusty. i'm having some issues. I have a file with the exstension .sb2 and can't figure out how to open it. What do I use? Also it doesn't seem to want to open some .exe files I have....what is wrong there? it's telling me it can't identify the program needed to open them. What am I doing wrong?