I have no idea what this means, how bad off is it?? I clicked "Verify Disk" and i got that, the other two options worked. I read up on this on Apple's site but I am not having any other issues than the notice. I was told to run Disk Utility ever so often to keep my mac fast. I just happened to do it today and I got that. I am trying to avoid having to do ANY sort of reformat.. I don't have any means of backup. Like I said I am not having any other problems. I am able to restart and log in without any problems. Should I be worried about this since there is no other issues besides the notice itself?