System keeps waking from sleep every 2 hours

Apple! This is getting very serious. My machine is fu.... I mean waked me up from sleep, because now it is doing it in every 2 MINUTES!!! This is very very annoying! Do something please! First in every 2 hours, but now in every 2 minutes! (MBP 15" Late 2011, Yosemite 10.10.1)

Dec 19 20:45:37 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 19 22:34:23 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 20 00:23:17 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 20 02:01:34 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 20 02:03:30 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 20 02:05:26 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 20 02:07:21 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Apple contacted me after I filed the bug report and requested configuration information, which I provided. This at least indicates that they are taking the problem seriously and working on a solution.

When Apple is going to fix it, with a software update? I have the same problem (RTC alarm) on my iMac!! It's very annoying because the mac is in my bedroom!!

I just can't believe this is happening again... i want to go out to the shed for the big hammer and beat the **** out of this machine!!!! Every 2 minutes again...

Dec 24 01:05:51 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 24 02:01:46 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 24 02:03:40 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 24 02:05:36 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 24 02:07:32 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 24 02:09:27 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 24 02:11:24 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 24 02:13:20 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 24 02:15:25 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 24 02:17:16 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 24 02:19:12 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 24 02:21:22 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

A temporary solution. I've accidentaly unplugged magsafe from my MBP and it stopped! Of course it is not possible for iMac users, but for me it can be... because it is doing it every night in every 2 MINUTES!

Dec 25 02:28:17 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:30:12 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:32:07 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:34:13 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:36:07 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:38:02 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:39:57 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:41:52 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:43:47 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:45:42 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:47:37 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:49:33 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:51:28 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:53:23 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:55:18 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:57:13 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 02:59:08 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:01:03 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:02:58 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:04:53 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:06:47 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:08:43 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:10:39 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:12:33 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:14:28 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:16:24 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:18:19 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:20:14 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:22:10 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:24:06 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:26:02 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:27:58 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:29:54 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:31:49 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:33:45 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:35:41 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:37:37 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:39:33 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:41:28 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:43:24 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:45:20 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:47:16 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:49:12 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:51:08 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 03:53:04 Yosemite kernel[0] <Notice>: Wake reason: RTC (Alarm)

Dec 25 06:56:23 Yosemite kernel[0] <Notice>: Wake reason: EC.LidOpen (User)

You might try this also, If you have an external disk plugged in to provide Time Machine backup services, try ejecting it and unplugging it before you put your computer to sleep. See if that helps.

The only thing this would 'solve' is *hearing* the external drives wake. I still hear the *internal* drive wake. Spun up and spun down, over and over again.

Model Name: iMac

Model Identifier: iMac12,2

Processor Name: Intel Core i5

Processor Speed: 2.7 GHz

Memory: 16 GB

Boot ROM Version: IM121.0047.B1F

12/27/14 2:49:34.000 PM kernel[0]: Wake reason: RTC (Alarm)

12/27/14 2:49:34.000 PM kernel[0]: RTC: Maintenance 2014/12/27 22:49:34, sleep 2014/12/27 21:01:3

12/27/14 2:49:34.000 PM kernel[0]: Previous sleep cause: 5

According to the rest of the Console logs, it carries on endlessly, every two hours, when the computer is 'sleeping'. So a dozen times a day, it wakes and spins up the drive. I unplugged everything, disabled every 'wake on' tick mark I could find. Nothing prevents it. It looks like it's doing that 'power nap' BS, but with absolutely no way to ever turn it off. The 'power nap' settings are missing in the System Preferences.

Unless I completely shut it down, it keeps waking and waking and waking, beating the crap out of my computer's hardware. Is this a hint that Apple wants me to hurry and buy something 'new', by destroying the old?

It was beating the crap out of the external monitor and everything else, too, since my UPS was set up to turn everything off, if the computer was shut off. Among everything else, I disabled that, and it still keeps waking. Which underlines another issue. If you 'sleep' it on UPS battery, it will carry on waking and sleeping while on battery power.

I previously had the NEC monitor issues, too, where it would fail to turn the external monitor on/off. They finally fixed it, and replaced it with something far worse.

Almost every one of the wakes on my MacBook Pro is eliminated by ejecting and unplugging the Time Machine disk, which is connected via Firewrie 800. I don't know if just turning Time Machine off will also work, but I will try that as well. It takes time to test these things since you have to wait a couple of hours after trying something to see if it works.

I also moved everything to "Not in Notification Center" in the Notification Center panel in System Preferences It's not clear if this has any effect.

It has been a while since this has been reported. I've seen this discussed since the beta days of OS X 10.10, so it's a little discouraging that Apple has not addressed this yet. From my standpoint, until there is at least a workaround, I would not recommend upgrading to Yosemite until this problem is fixed, as you cannot have machines waking themselves willy-nilly, especially in situations where they are unattended, as is often the case with a sleeping machine.

I've found that sleep is much more reliable after installing the latest system updates, particularly 10.10.2! I've not had a nighttime waking for nearly a week. Have others found this to be true?

Yes. On 10.10.2 beta I've not had a nighttime waking.

Thanks guys for the suggession, I have installed 10.10.2 beta also, tonight I'll test it 🙂

Hi. On 10.10.2 beta, installed 28. Dec. no more RTC wake up events in log! Tested on MBP 13" late 2009 and iMac27 late 2013.

I also have installed the 10.10.2 pubblic beta on my iMac late 2007, and thank goodness the problem seems fixed!!!

I too can confirm that public beta 10.10.20 stops the wake issue I had on my MacPro (early 2008).

Glad to hear the 10.10.2b release fixes the problem. I've had same wake from sleep problem as others here on my 2012 mac pro tower since upgrading to yosemite. I'll wait for the OS official release.