Question: How do I unlock Mac OSX Base System
I have a late 2013 MacBook Pro 15”.
Yesterday mac sierra asked if it should update, without reading I clicked yes.
Now when I try to power on, I get stuck at the Apple logo and loading bar.
When end I reboot in internet recovery, it brings up Mac utilities but here is where Im stuck.
I’ve read countless threads on here that say I need to first erase the OS X Base System But when I go to erase it’s grayed out and I can’t click on it.
Then an I tried to reinstall Sierra but it says the OS X System is LOCKED!
How do I move forward from this to get my computer working again?
Thanks for your help!
MacBook Pro with Retina display, iOS 11.2.5