Hi, I have a problem since now, I have upgraded ML 10.8.1 a few days ago and it has been working fine until now. But today I shut down my computer for the first time and when I turned it back on, I had the apple logo, with a progress bar under it. The progress bar progressed to 100%, and the computer shut down, and it does that everytime now. The thing I notices (I don't know if it helps), is when I press alt, after turning the laptop on;, instead of having Mac written under the macos hard drive, it is written EFI Boot. Any help would be appreciated. Thanks!!!