Hi, I did an update yesterday evening from mavericks. Install went fine and Yosemite installed OK and I was able to carry on as normal. I then shutdown my machine and today I can't login. I did a recovery start, reset permissions, verified disk, reset pram, I even reinstalled using recovery. But still the same result. When I enter my password the progress bar stalls at about 50% and nothing happens. Anyone any ideas? Unfortunately my time machine is not working and the last backup is 50 days.