So hello all. I am new to the whole Mac world. I have an Iphone 5 which has lead me to purchase a used macbook. I do not know what year it is as it had been unoperational for about 6-7 months and I think I just forgot. Here is the issue; It is froze on the gray boot screen (apple logo, spinning boot wheel) common problem I understand. I am able to get into recovery mode and Lion seems to be the OS. Original OS on the mac I am not sure as it is used. By the way it did work when I bought it. So I took it in to a certified repair store an they were able to get it running. I have considered doing that again but the cost has doubled. If i can fix it for the cost of purchasing Lion OS on my app account I would do that. I am kind of pressed for time and before I send it off with "a guy who can fix it" I want to attempt my self. I have Mt. Lion on a thumb drive that was purchased for me by a friend thourgh their account as we were unable to find lion in the app store. Can I use the Mt. Lion to bypass the need for lion? Can Some one please help me with compassion for a New-B who is trying to get started in the Mac world. Make me a believer.