I'm new to this forum i need some help with Mac computer which is troubling me and so i apologize if this question is in the wrong place or has been asked before. This happened when there was supply fluctuation power supply last night. Some of the data which is stored on my Mac volume does not open. I tried opening it but i failed to do so. This is the first time i am facing this problem. I would be happy if any one of you could help me with this.