Hey everyone, I'll just get straight to my problem. I've installed bootcamp a few months ago, mac AND windows both booting up nice and properly. For an amount of time, I did not open up windows since I had no use for it. Just recently, a few days ago, I needed to use an art program that had no Mac version, so I went on my Windows 7. After I had finished, I shut down my Windows, opened the laptop again, and choose my Mac drive this time. For an unknown reason, my Mac stayed on the spinning gear screen (the loading screen) and for about 20 seconds, had a bar on below the apple and the gear. Then, the mac would not boot, and just completely stayed on the loading screen. I ignored this, went back to Windows and stayed there for a few hours, and decided I had to fix the problem. I tried to boot up Mac again, and miraculously, it worked! But now, today, it has went back to the same problem, and I have tried to do what I did before, but it isn't working. Has anyone had a similar problem? I didn't backup my Mac harddrive because I would've never thought something like this would've happened. It would be awesome for some advice.