2009 MacBook Pro crashed while upgrading OS
Decided to upgrade my 2009 Macbook pro 15" to El Capitan 10.15
It froze at the window: "...calculating time remaining..."
The next day, I forced shut down with power switch.
Now when I turn it on, it starts with the error message in several languages about not shutting down properly, I get the grey screen with apple logo momentarily, then it goes black. (Repeated this several times.)
I have a Time Machine backup on an external drive. Any way to put it back the way it was?
Is this a good question?