My iMac won't sleep
I set my iMac display sleep and computer sleep to start after 3 minutes of inactivity, but for the past 2 weeks, only the display goes to sleep. I've tried restarting my computer, and shutting it down for a day, but every night when the computer is still on, i can hear the disk spinning even though the display is black and the computer should be entirely asleep. Clicking the sleep button at the top left hand side also doesn't put my computer to sleep, only my display. What suggestions do you have?
iMac, OS X Yosemite (10.10.4)
