Yeah, El Capitan. But while I was waiting for a reply, I found a website that gave me the answer. Now I got an even MORE immediate problem.
I have been recently been getting a message that says I am out of application memory. Now, since I have not added anything to my iMac since I got it a year ago, have not taken memory out of it, or modified it in any way, why all of a sudden does it give me that problem. And when I click anything on the screen, all I get is that spinning disk, and I'm unable to do anything.
I'm completely mystified why this is happening.