You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

System keeps waking from sleep every 2 hours

Since Yosemite update, system keeps waking from sleep approx. every 2 hours. It goes back to sleep on its own but keeps waking up again. I have "wake for network access" in System Preferences turned off. Here are samples of the console messages:


10/19/14 1:02:43.000 AM kernel[0]: Wake reason: RTC (Alarm)

10/19/14 1:02:43.000 AM kernel[0]: RTC: Maintenance 2014/10/19 08:02:43, sleep 2014/10/19 06:14:45

10/19/14 3:00:41.000 AM kernel[0]: Wake reason: RTC (Alarm)

10/19/14 3:00:41.000 AM kernel[0]: RTC: Maintenance 2014/10/19 10:00:41, sleep 2014/10/19 08:12:51


I have no idea what "Wake reason: RTC (Alarm)" means. Any help would be appreciated.

iMac, OS X Yosemite (10.10), 2011 iMac Intel Core i5 12GB RAM

Posted on Oct 19, 2014 5:20 PM

Reply
109 replies

Oct 31, 2014 10:48 AM in response to James Brust

Got the same problem here...


31/10/2014 12:54:58,000 kernel[0]: Wake reason: RTC (Alarm)

31/10/2014 12:54:58,000 kernel[0]: RTC: Maintenance 2014/10/31 11:54:58, sleep 2014/10/31 10:07:03

31/10/2014 12:54:58,000 kernel[0]: Previous sleep cause: 5

31/10/2014 12:54:58,005 sharingd[196]: 12:54:58.005 : SDStatusMonitor::kStatusWirelessPowerChanged


don't know what to do apart switching off the imac each night

System keeps waking from sleep every 2 hours

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.