Kledson
Level 1
(0 points)
Q: Imac spinning Fan when sleeping
My Imac mid 2011 running iOS yosemite constantly spins its fan or HD ( I'm not sure which is spinning), after the computer enters in the sleep mode it seens to spin at high speed for about 15~30 seconds than it suddely stops to restart again after a minute or so. It does it all night while the computer was supposed to be in sleep mode, but all the rest of the machine is ok and running smootly without any problem. This is starting to annoying me first because it not seen to be a normal thing, and second cause the imac is in my bedroom and in the middle of the night in a silent room this sound is very distressing.
HOpe it is not a big iisue and someone could come with a fix for it.
iMac (21.5-inch Mid 2011), OS X Yosemite (10.10.3)
Kappy
Level 10
(270,334 points)
Mavericks and later
Open Activity Monitor in the Utilities folder. Select All Processes from the View menu. Click on the CPU tab in the toolbar. Click twice on the CPU% column header to display in descending order. If you find a process using a large amount of CPU time (>=70,) then select the process and click on the Quit icon in the toolbar. Click on the Force Quit button to kill the process. See if that helps. Be sure to note the name of the runaway process so you can track down the cause of the problem.
