My iMac has been running slow, text lags, Safari crashes on a regular basis, and roughly once or day my entire system completely freezes and I have to hold down the power button to restart it. So I figured I'd try repairing permissions and repairing the disk via Disk Utility. I restarted and held down Command + R and then used Disk Utility to verify and then repair the disk. Then I got the dreaded message "Disk Utility stopped repairing Macintosh HD" "Disk Utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files." YIKES! I've got 1TB of files. Is there any software out there which is better than Disk Utility and might be able to fix the problems without having to individually save all of my files and do a fresh install and replace all of my files? Such a procedure would easily take a full day or more given that I have so many files. Any recommendations would be truly appreciated! I just bought a 27" iMac that is on the way and should be here in about a week, but I fear that if I don't resolve this problem now and migrate over to the new one, I'm only going to be giving the new iMac all of these same faults.