Hello, I would imagine this has been asked a million time, however I'm having issues with the solutions I've tried. I freshly installed maverick and finished it off with a clean bootcamp install of 8.1. Things worked great for a week or two, I never logged into mac during the time. Now I can't boot into mac, I get the long progress bar during start up, that never finishes. If I boot into recovery, I get an error saying first aid can't be completed, please reformat. So I decide to get rid of everything, but I can't reformat the mac partition, it just gives me an error. I can see the files on my mac partition through windows, but they give an error when trying to open/copy etc. While I would love to get the files off the hard drive, I can live without it. Is there a way to either, repair the partition or get rid of it all and start again. Thank you for any help given!