15-inch, Mid 2012
OS X El Capitan
Processor 2.3GHz Intel Core i7
Graphics Intel HD Graphics 4000 1024 MB
500GB SATA hard drive
I upgraded to El Capitan and now it seems I have no sound. I press the keyboard buttons up Sound / down Sound but the only thing that displays is the speaker symbol and a 'cancel' symbol.
I Googled for some solutions that did not help. I went to System Preferences > Sound but anything I messed around with didn't help. It's like El Capitan thinks I have no physical (internal) speakers. I went to Terminal and typed 'sudo killall coreaudiod' but that did nothing. I restarted the mac but that did not fix this. I reset PRAM but no bueno.
The solutions here
did not help me at all.