I have a 27" Late 2013 iMac with 8GB RAM and a NVIDIA GeForce GTX 775M (2GB) GPU.
Last year my iMac started crashing now and then. Not only that, when it's in sleep mode it just falls out. I have to pull the wire out and in again and then it works again. Very annoying.
I brought it back to the store and they did a hardware check, nothing was wrong apparently.
They looked into the logs and saw that before my iMac crashed the 'Steam -app' was mentioned. So they suggested that I have to reinstall the iMac. Weird I know. So I asked a friend to do that for me since I'm too afraid to make a mistake.
So the iMac was clean and yet again after a few hours it crashed. I downloaded software to see if the fans were working right or the temperature was too high. Again no problems. I used the console to get the CPU to work 100% to see if it would crash. Nope.
So I thought maybe it was the power supply and I tried a different cable. Nope
I looked into the log again and now I see that the last crash was because of com.apple.dictionaryServiceHelper??
I uploaded a screenshot of this: (log+About This Mac)
I'm no iMac expert at all so I just don't know what to do anymore.
How can I continue troubleshooting this?