Just updated to Beta 4 today and it seemed to go well until the install screen froze for hours. Ended up running out of battery (yes, yes, yes I'm stupid starting an update w/o a charger). Now when the computer attempts to boot it gets to the login screen and behaves normally until the screen flashes (looks like its switching video preferences?) then soon after the screen starts to pinwheel. I'm able to boot in safe mode, and have run First Aid through disk utility. Looking at the console it appears as though there are issues with the XPC service. Does anyone have any suggestions for fixing this issue? Any help is greatly appreciated!