Why iMac turns by itself to "wake for network access"?

Hello,
does anyone know why my iMac turned automatically "Wake for network access" mode in Energy Saver preferences?
I just installed 10.8.2 Mountain Lion to my iMac and changed sleep time to 1 hour and display sleep to 25 min.
Created second user for other family member. And saw that when computer display sleeps and I wake up it, they ask me a password (there was no such thing on 10.6 to ask password just after display turns out).
So, after all I Restore defaults of Energy saver and saw, that "Wake for network access" by default is unchecked?
Should I worry about somekind of hijacking?
P.S. Sorry for my english.

up!

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"Wake for network access" wakes iMac by default?

Hi,
i've got a question about the wake for network access on my iMac 27'' (mid 2010) and snow leopard 10.6.7
in the Energy Saver options i see an option enebled by default: "wake for network access"
if i restore the default settings this options will be enabled....am i right?
My trouble are about this default settings with the "wake for network access" enabled: when i put my imac in stop i notice random wake up with lcd off...and then stop again by itself after 5-7 seconds.
is it normal this behaviour?
i dont understand if this is a default behaviour of imacs in stop (with default settings) or happen only if there is something that try to access on my network...or some other problem.
It's strange that by default a user that put his imac in stop during the night can be waken up by the iMac that wakes up!!!
of course if i uncheck the "wake for network access" no more wake up...but i want understand why the computer wakes up with this option checked......because it's checked by default. is it normal for all imac with snow leopard or mine have a problem?
I hope that someone can understand my bad english and give my some support
thanks
Ivan

up!

IMac after 10.6.8 update no more Wake for network access!!

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OK. I fixed the problem, for me at least. My time capsule wasn't even showing a light on for the ethernet port, the card in my mac pro was clearly powered down which would explain why the magic packets go missing.
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I've read about this a little on these forums, but haven't found the solution yet.
My computer has "wake for network access" turned on. My AppleTV will not see my shared iTunes library, not until I wake up the computer by hand.
The only other part of the equation is the FiOS router that I use, which is model number: MI424-WR.
Has anyone come up with a guaranteed solution to this problem? Very annoying. Just bought the AppleTV, and think it's otherwise great. This flaw is just unacceptable. If I have to modify my router somehow, I'd be happy to hear about it... as I don't have any problem doing those kinds of things.
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OK, I got an Airport Extreme, but still having issues.
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On my new iMac, mail has no sound after waking from sleep. If I select do not wake for network access in general preferences, the problem does not occur. Anyone have an idea on how to fix this?

On my new iMac, mail has no sound after waking from sleep. If I select do not wake for network access in general preferences, the problem does not occur. Anyone have an idea on how to fix this? Thanks --

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IMac/Mavericks won't Wake for Network Access

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Energy Saver/Wake For Network Access is checked
I even UNchecked Put Had Disks To Sleep
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Hi,
I have the same problem. I have also checked the settings as described.
It is really annoying that if I want to use my new Apple TV to stream from the iMac, I have to go upstairs and wake it up first.
My wireless network is via a Sagem router using Channel 2 and 802.11g.
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Wake for network access what has happened?

Hi everyone...
When snow leopard came out I tried the wake for access feature and used it quite often... Because the computer screen used to come on at night (no clue why) I reluctantly turned the feature off. Now I would like to reuse it and it doesn't want to work.. Why not? Is there a system preferences file that is corrupted?
First my setup:
iMac running 10.6.3 under energy preferences I've rechecked wake for network access. This is connected by ethernet to
My airport base station running firmware 7.4.2 and it is a 802.11n model and as such "wake from sleep over network" compatible
trying to access the imac is a macbook (early 2009) also running 10.6.3
Now when the computers are running, they show up under "shared" and I can connect/share screens without a problem.
Sadly when the iMac is asleep it doesn't show up under shared (it used to when I tried the feature last Winter.
The only difference that I am aware of is that my imac was repaired a couple of weeks ago and the whole motherboard and network components were exchanged. Could that have anything to do with it?
Also I do change preferences fairly often. Is there anything that I'm missing? On a related note, I do now hear my computer sometimes cycle up (screen now off), which makes me think the system is waking up to report to the base station. But why is it not showing up?
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Phillyman
Below a part of my console during the night..
4/12/10 4:17:19 AM kernel Wake reason = RTC
4/12/10 4:17:19 AM kernel RTC: maintenance alarm 2010/4/12 02:17:19, sleep 2010/4/12 00:17:21
4/12/10 4:17:19 AM kernel System Wake
4/12/10 4:17:19 AM kernel Previous Sleep Cause: 5
4/12/10 4:17:19 AM ntpd[39] sendto(17.151.16.21) (fd=26): Can't assign requested address
4/12/10 4:17:20 AM kernel Ethernet [AppleYukon2]: Link up on en0, 100-Megabit, Full-duplex, Symmetric flow-control, Debug [796d,6f08,0de1,0200,45e1,4000]
4/12/10 4:17:21 AM ntpd[39] sendto(17.151.16.21) (fd=24): No route to host
4/12/10 4:17:27 AM configd[14] network configuration changed.
4/12/10 4:17:27 AM ntpd[39] sendto(17.151.16.21) (fd=24): Network is unreachable
4/12/10 4:17:35 AM ntpd[39] sendto(17.151.16.21) (fd=26): Network is down
4/12/10 4:17:36 AM configd[14] network configuration changed.
4/12/10 4:17:37 AM kernel System Sleep

On the affected M<ac look at it's logs using /Applications/Utilities/Console. This way you can find out if a third party program might be waking it up to call home.

Wake for network access by default??

Hi,
i've got a question about the wake for network access on my iMac 27'' (mid 2010) and snow leopard 10.6.7
in the Energy Saver options i see an option enebled by default: "wake for network access"
if i restore the default settings this options will be enabled....am i right?
My trouble are about this default settings with the "wake for network access" enabled: when i put my imac in stop i notice random wake up with lcd off...and then stop again by itself after 5-7 seconds.
is it normal this behaviour?
i dont understand if this is a default behaviour of imacs in stop (with default settings) or happen only if there is something that try to access on my network...or some other problem.
It's strange that by default a user that put his imac in stop during the night can be waken up by the iMac that wakes up!!!
of course if i uncheck the "wake for network access" no more wake up...but i want understand why the computer wakes up with this option checked......because it's checked by default. is it normal for all imac with snow leopard or mine have a problem?
I hope that someone can understand my bad english and give my some support
thanks
Ivan

up!

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I have the same problem and I don't set it on the login screen.
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Wake for network access not reliable over internet...

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The remote app can either automatically find libraries available on a network (with home sharing available) or if you haven't got home sharing enabled, you can manually pair an itunes library with the remote app (using a number that is generated by the app and then typed into the itunes library).
That is why I am so confused, as it seems to be the home sharing that is the problem!

"Wake for Network Access" Won't Stay DISabled

I'm trying to prevent my iMac from needlessly waking. When I uncheck "Wake for Network Access" in Energy Saver, after I've restarted the computer the setting does not stick. I've tried deleting the energysaver preferences file in /Library/Preferences/Systemconfiguration, as well as repairing disk permissions. The checkbox keeps rechecking itself after logout/restart. Any ideas?

Check the Log Me in Client, it has an option for Wake for Network access - which enforces the option.
I had the same issue and wanted to kill someone

"Wake for network access" doesn't seem to work

I have several Yosemite Macs. My main Mac Energy Saver setting is set to wake for network access. That's the only box checked (Display set to turn off after an hour).
I can't seem to get access to this computer on my network (get a "connection failed") after the display turns off.
Any other settings I need to set to cure this?

Please follow Linc Davis's advice to see if you have a Sleep Proxy server on your home network. For example, here is what the command shows on my home network:
dns-sd -B _sleep-proxy._udp local
Browsing for _sleep-proxy._udp.local
DATE: ---Sun 12 Apr 2015---
16:34:14.530 ...STARTING...
Timestamp     A/R    Flags if Domain        Service Type         Instance Name
16:34:14.531 Add        3   5 local.        _sleep-proxy._udp.   30-35-10-70.1 Pantry
16:34:14.531 Add        2   5 local.        _sleep-proxy._udp.   50-35-10-70.1 TV_Console
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<http://www.readpixel.com/wakeonlan/index.html>
The Sleep Proxy or WakeOnLan will send a specially composed network packet that the networking hardware listens for and will wake up the Mac when it is seen.
The Sleep Proxy server pretends to be your Mac while it is asleep, and if you attempt to connect to the Advertised service, the Sleep Proxy server will send that magic network packet to wake up the Mac, and forward the connection request to the new awake Mac.
<http://en.wikipedia.org/wiki/Bonjour_Sleep_Proxy>

"wake for network access" not working

Hi guys,
I enabled System Preferences > Energy saver > Wake for network access
and
System Preferences > Sharing > remote Login
These are the exact settings I had under Snow Leopard and it used to wake my iMac via 5GHz WiFi. I use a AirPort Extreme and didn't change a thing on its side. But neither with VNC nor with my iPad app "Screens" I am able to wake it under Lion. Screens tells me "Computer in sleep mode"...
Any help?
Thanks in advance,
Bado

I've been having problems with wake for network access on Lion as well. Similarly to others, if my iMac has recently gone into sleep mode, then it will wake up for Apple TV use or for file and screen sharing from another computer. After an extended period of time, however, all such functionality disappears.
I've been rooting around in System Profile and have found something that may be of interest. Under the Hardware section, in the Power menu, there is a parameter called 'PrioritizeNetworkReachabilityOverSleep'. On both my iMac and Macbook this is set to zero (i.e. 'no').
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Hopefully we'll be able to get to the bottom of this, as over six months after Lion's release the problem has yet to be resolved by Apple through version updates, something that is especially frustrating given how excellent a feature wake on network access is when it can be reliably coupled with an Apple TV or Back to my Mac.

Wake for network access while on battery?

I want to wake for network access when my mac is not plugged in to a power source. Is there a command I can run in terminal to do this? Its not like it consumes that much battery power to do this. Heres a simular thread that was never answered. https://discussions.apple.com/thread/2519093?threadID=2519093

OK, I got an Airport Extreme, but still having issues.
Why would I need to plug the AppleTV into an Ethernet cable? It doesn't have any sleep issues... it just can't wake up my Macs. I thought that would be possible.
In any case, I can't connect my AppleTV to Ethernet... no ethernet near my television....

Why iMac turns by itself to "wake for network access"?

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