All iOS - iPhone, iPad, iPod touch, Apple TV &...
My (93 year-old) Dad's iMac has suddenly stopped going out to the internet. I suspect that some System file has been corrupted.
It is a 2012 iMac, 2TB internal, 4GB RAM, running El Capitan (10.11.6) - I believe that's the last OS that will run on this hardware.
The network setting in the...