Yosemite 10.10.5 to El Capitan 10.11.6
Help! My mother never updates anything. She was recently curious why her browsers were stalling/acting up and I asked if she had updated them recently. The air was thick with silence.
She has a MacBook Pro 5,5 that was still running Yosemite so I figured i would help and get to the final update that her Pro would take; El Capitan. So, I found the link on Apple's site for El Capitan and proceeded to download.
Now, the install stalls a few minutes into the process and I cannot get it to finish and cannot get the machine to revert back to Yosemite. I know that the 5,5 is compatible with El Capitan, because I had the same model and it ran just fine.
So, why does El Capitan start and then stall and how to get it to finish. Worst case is to revert back to Yosemite to get the Mac to run again, if that's even possible.
I appreciate anyone who can help me tackle this issue. Thank you.
Daniel