Something is causing the processor to run hot. The fan is always on. Had this problem a month ago with Parallels and resolved it. Now it runs hot when Parallels is shut down.
iMac (Retina 5K, 27-inch, Late 2014), OS X Yosemite (10.10.5)
Look in Activity Monitor to see what the culprit is
Thanks, I looked at that first. It seems whatever it is, it's running in background. My guess it's something in the operating system itself.
As you have looked, what is it?
Activity Monitor shows all processes, background or not.
That's what I thought. That's why I'm looking for another explanation.
OK, lets keep this simple, what is the top process and how much cpu percentage is it using?
Does the Activity Monitor Window show All Processes" in the header bar?
By default Activity Monitor does NOT show background processes. Until you change the settings, it shows "My Processes." You have to use AM's "View" menu to change the setting to show "All Processes":
Once you change the setting, it will remain at "All Processes" until you change it again.
This Apple article explains the test:
Apps can affect Mac performance, battery runtime, temperature, and fan activity - Apple Support
Try a SMC reset. The article covers when this is required, but doing this will not affect anything.
It looks like resetting smc has cooled things down.
Thanks.
You are welcome.
cpu is running hot
