After Yosemite my iMac is awake from sleep

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After Yosemite my iMac is awake from sleep

Hello everyone., I posted a similar post here Yosemite: Power Nap enabled on a 2011 iMac?

I try to explain better here. After I installed Yosemite on my iMac mid 2011 (iMac12,2), the computer is awaking from sleep mode several times in the night. The screen remains black and it's behaving like Power Nap is acting, although is not possible, Power Nap is not enabled on this Mac and not visible on Energy Saver prefpane. Also, the option "Wake for network access" is *not* enabled at all. The awakening is lasting for 1-2 minutes and I don't hear any sound, even though new mails are received, then sleeping again. I deleted Energy Saver prefs: com.apple.PowerManagement.plist in ~/Library/Preferences but with no success. Anyone had the same problem? I would prefer to use Stop option instead of shutting down completely, too much convenient starting from where I left a few hours earlier.

Thanks for reading,

Raffaele

Posted on Oct 22, 2014 12:26 PM

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Answer 1

llou_sfx

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5 points

Oct 27, 2014 2:03 AM in response to macraider

same problem here, wish there is a solution !

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Answer 2

macraider Author

Level 1

80 points

Oct 27, 2014 10:12 AM in response to llou_sfx

Hi llou_sfx, the trouble is still going on. Let's see if we have in common any peripherals:

- Lacie 5big Thunderbolt drive

- Jawbone Big Jambox connected via USB (just for recharging)

- Elgato EyeTV

Except for Lacie drive because is needed, I tried to disconnect Jambox and apparently didn't happen many times.

Now I want to try disconnecting EyeTV tonight.

Only 2 people with this trouble? Too strange, for me could be any software installed on the Mac, let's help each other please.

Thanks for replying, I let you know.

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Answer 3

llou_sfx

Level 1

5 points

Oct 27, 2014 1:38 PM in response to macraider

Hi macraider,

I also have a thunderbolt HDD, and haven't unplugged it. It worked fine with on Mavericks.

When I look the Console I noticed that the imac would wake often, every 2 hours or so. The screen remains off, but the computer is on for a minute.

I checked the network settings, reset the SMC and the PRAM, cheched the energy-saving params and ... time will tell if it worked. I'll let you know.

I found lots of persons on apple discussions having the same trouble....😟

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Answer 4

macraider Author

Level 1

80 points

Oct 27, 2014 1:52 PM in response to llou_sfx

I can confirm the iMac is on every 2 hours or so. I didn't reset SMC/PRAM yet. Thanks in advance to let me know.

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Answer 5

Darklykoz

Level 2

216 points

Oct 27, 2014 2:06 PM in response to macraider

Ok here are some suggestions:

1) I own a Macbook Pro... So dont know how the IMac Power Nap settings are...

However on the Macbook Pro we have a Power Nap that can be enabled on 'Battery" or "power adapter"

I dont know if iMac even has the "battery" option... But I would imagine that your iMac corresponds to the "power adapter" option... So you would have to untick power nap under that heading...

2) In Preferences -> Energy Saver ->Schedule... You will find more settings that you may find of interest...

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Answer 6

macraider Author

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80 points

Oct 27, 2014 2:10 PM in response to Darklykoz

There is no Power Nap option on a mid 2011 iMac, as I written at the top of the page:

The screen remains black and it's behaving like Power Nap is acting, although is not possible, Power Nap is not enabled on this Mac and not visible on Energy Saver prefpane.

Thank you anyway

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Answer 7

Darklykoz

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216 points

Oct 27, 2014 2:20 PM in response to macraider

And 'schedule' in Energy Saver didnt help either?

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Answer 8

macraider Author

Level 1

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Oct 27, 2014 2:21 PM in response to Darklykoz

I always schedule. I will try with no schedule and I will let you know tomorrow.

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Answer 9

llou_sfx

Level 1

5 points

Oct 27, 2014 2:24 PM in response to macraider

here is an other thread of people having the same issue :

Since Yosemite, iMac won't stay asleep

and I do not use the schedule option...

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Answer 10

macraider Author

Level 1

80 points

Oct 27, 2014 2:44 PM in response to macraider

I have found this:

http://www.insanelymac.com/forum/topic/300072-wake-reason-rtc-alarm-how-to-deac tivate

The cause of awakening is

I hope will be helpful, but I don't know how to proceed.

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Answer 11

llou_sfx

Level 1

5 points

Oct 27, 2014 2:51 PM in response to macraider

My last changes didn't work : I guess we'll have to wait for an Apple official patch.

the link on http://www.insanelymac.com is very interesting but I do not wish to go too far in altering Mac OS X with command lines...

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Answer 12

macraider Author

Level 1

80 points

Oct 27, 2014 11:21 PM in response to macraider

system.log says my iMac was awake at 2:29 , 4:18 , 6:07 this last night

Wake reason: RTC (Alarm)

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Answer 13

macraider Author

Level 1

80 points

Oct 31, 2014 11:29 AM in response to llou_sfx

I have found a temporary solution but with a little trouble:

type in the terminal:

sudo /usr/libexec/PlistBuddy-c "Add :ProgramArguments: string --no-multicast"/System/Library/LaunchDaemons/com.apple.discoveryd.plist

then reboot your Mac. If something went wrong, you can revert with:

sudo /usr/libexec/PlistBuddy-c Revert/System/Library/LaunchDaemons/com.apple.discoveryd.plist

Connect wi-fi in System Prefs or Menu bar and choose your wi-fi network again. The little trouble I mentioned is that you don't see the power strength of your wi-fi in the menu bar, will be shown as disconnected, but is not.

Please let me know if worked for you also!

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Answer 14

Nov 23, 2014 7:50 AM in response to macraider

Also, be prepared for problems:

Time Machine does not work to a remote server (can not compare Server.local. and ip address);

You can not connect with standard interface to the SSH server.

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Answer 15

macraider Author

Level 1

80 points

Nov 23, 2014 8:04 AM in response to truekenny

Thanks truekenny, a warning in case someone needs. I don't need to use both services

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