Starting recently, every time I try to restart my laptop (MacBook Pro 15-inch, Mid 2012) everything exits fine, the menu bar disappears, but then finder won't quit. If I open the dock and right-click it, it says 'application not responding'. Clicking 'relaunch' doesn't seem to do anything. The only thing that seems to work is holding down the power-button to force a shutdown, or doing Cmd+cntl+Power to force a restart*.
I tried booting in safe mode, and trying to restart there -- but I have the same problem.
Has anyone had this problem before?
OSX El Capitan 10.11.1
*This forces restart doesn't allow updates to be installed.