I do believe this problem is the result of the last update, but right now I only care about my dissertation. I have my graduate dissertation due in a few days. I restarted my MBP to clear out the RAM and it wouldn't come on. I kept getting the white screen of death. I opened Recovery Mode and the Macintosh HD is greyed out and not mounted. When I try to verify and repair it, it gets stuck on 'Checking Catalog File.' I can use Safari and use the Open file an I can see all of my files in there. I cannot upload them to email or Google Drive. I ordered DiskWarrior but I think they are asleep for the night. I have an external USB drive. I tried to copy my Macintosh HD to that drive but I get another error. I tried to do the New Image thing and it's the same. I was trying to go into Single User Mode and manually copy the files, but I am nt sure how nor where the directory structure is for the USB drive. Is it possible to do this? I don't care if it's time consuming, I need my dissertation files. I'm afraid to erase and restore the HD until I recover my files. I really need these files so that I can finish this dissertation and not have gone another $57k in debt just to end up without my degree.