I just updated to iTunes 12, and I when I open it, nothing happens. The icon on the Dock doesn't even bounce. When I start it in the Terminal, nothing happens either, no messages. When I open it with
sudo, the application does show up in the dock with a dot, but no messages or UI.
I don't think it has anything to do with my user profile since it does not work in
sudo either, it does come closer to work though, but it's a very very small difference. I have rebooted the computer, obviously.
I also tried reinstalling it, it's been stuck on "moving files to their right places" with 1 minute left for 7 hours.