

Is it correct to assume that this means it was not an application that crashed? Here's what I've done so far to troubleshoot:Īfter power-cycling, I go into Console.App, and select "Crash Reports" on the sidebar, it is always empty. The system crashes this way usually at least once and often a few times per day if I use it a lot. What I normally do is just power cycle the iMac as soon as I hear the fans spin up and the applications become unresponsive. If I keep waiting, the screen goes black and if I wait a longer time the black screen gets a circle with a slash through it. Eventually, I get the "rainbow circle" (beach ball?) mouse cursor and I can't do anything else other than move the mouse around. I am not even able to restart the iMac from the Apple menu (it just doesn't respond). When the fans spin up like this, the applications I am using (typically Chrome, but others too), will work for a little while, ~30 seconds, and then become unresponsive. I've been having an intermittent problem with my late 2013 27" iMac for more than a year now and it seems to be getting more frequent.īasically, I could be doing anything on my iMac (or nothing at all!) and I suddenly hear the fans spin up to what sounds like max speed.
