I noticed these a few times in the public betas and reported them, but it looks like they've not been fixed. I've been using Yosemite about a month and on a few occasions I've restarted my system only to have it not restart until I used the power button. A few times when I went to shut down it just sat there with a mouse pointer and a black screen and I had to use the power button. Lastly, twice when betting up it would get halfway through the loading bar and then go black and restart itself. Have you noticed these? I'm on a late 2013 rMBP 15". ---------- I don't want to start a new thread on this: if I choose to go back to Mavericks for now I can restore my files from a Yosemite TM backup correct?