There have been lots of criticisms of Norton for mac osx. Version 7 being their 1st entry into osx was a poor effort. V. 8 is greatly improved. But what i don't like about it is it leaves hidden files everywhere. What I do like about it is it's been able to repair problems that none of the previously mentioned utilities could repair. And that includes directory corruption that even disk warrior couldn't repair. I found that surprising. It also repaired my external drive on no. of occasions. But I do use Norton waringly.