iMac 2013 becomes unresponsive

About once a day, with El Capitan iMac reacts forcing a hard power off. Here are the different symptoms.

The system becomes increasingly less sensitive.

The screen may go black but the mouse cursor remains active.

Can I get a color wheel when hovering over the Apple/Finder menu, but not on the portion of time/volume.

Windows can be stuck off the screen when displaying the desktop. I can always click on the icons on the desktop, but nothing happens.

I can bring up and place the cursor on the dock, but I can't open anything.

Sometimes I can open items in the dock, but there is not a right click on the feature.

I can get a prohibitive sign on reboot, asking the second restart.

When I boot, the same random folder iphoto opens upward... (Like some buried the hidden database file.)

El Capitan 10.11.2 (15 c 50)

iMac (27 inch, at the end of 2013)

3.5 GHz Intel Core i7

32 GB 1600 MHz DDR3

NVIDIA GeForce GTX 775M 2048 MB

CLICKY CLICK---> EtreCheck & and paste your report.

"EtreCheck is a simple little app to display the important details of your system configuration and allows you to copy this information to the Clipboard. It is intended to be used with Apple Support communities to help people to help you with your Mac. »

Tags: Mac OS & System Software

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