I just logged back on to my Mac OS X 10.5 after it crashed. It crashed when I woke it out of sleep mode and a message came up telling me to hold down the power button. I've gotten this message before, but it was a very long time ago. Anyway, I was working on a christmas present, and now it is gone. I didn't have a chance to save it before the computer went to sleep. I believe Windows has a rollback option to go back to a previous state of time on the computer, or to before the problem. Does Mac have this option? Or is there any other way to retrieve my work?