I tried updating to el capitan beta 2, my computer restarted and now its been stuck at 3/4 updated for hours now.
I cant log in to delete any affected files (which is what some other people said to do).
I cant hold cmd-r to enter recovery mode, it doesnt do anything even when I restart and hold it as soon as I hit the power button.
I tried booting off a external harddrive that i backed up all my stuff on a few months ago, that wont work either- it just gets me to enter my apple id then keeps on updating.
If anyone could help me out it'd be much appreciated, my laptop is useless at the moment. 😟