I downloaded Norton for Mac approximately 10 days or so ago. I had a recent update to my iMac El Capitan, currently showing version 10.11.4. I hadn't updated manually for a while and did so last night, but the update hung up and never completed. Then I got the "fix it" notice, but after more than 15 minutes (guessing here) I gave up.
Then I started getting Apple error notices. Deleted Norton and reloaded multiple times, each time trying something different. Nothing works.
Here's a screen grab of the first part of the Apple error notice. I'm pretty much a noob concerning my Mac, etc, so I don't know if this info shouldn't be public, but I think it's ok? 