Late 2014 27-inch iMac Retina with 512GB SSD crashes multiple times per day. Every day. Have been on phone with Apple Care. The best they can say is... take it in. I can do that, but fear the problem might not present. Plus the closest store is 70 miles one way. The computer will crash under any activity, even when sleeping. Have re-installed latest OSX. Also, have noticed that I now get frequent crashes of browsers and other apps. All of this has occurred since Day 1. I have installed 16gb of Crucial Ram (first day). Have removed the added RAM and still get the crashes. Any ideas from you smart folks?