Disconnect to wireless when computer sleeps

When I get on the computer for internet after the HD/screen are asleep the wifi connection is lost. Sometimes it finds it and reconnects which takes 30-90 secs, but sometimes it will net find it and I have to sign on to the network. I have an older iMac that is pre-intel processor that stays connected. I suppose it is something with snow leopard.
I have tried a few techniques that as mentioned on the support pages, such as deleting other network choices.
Is there a solution?

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I have the same issue. Also after wake-up connecting to PPPoE is a challenge, because it establishes only after 5-7 attemps (Authentication failed). I guess 10.9.3 update causes this.

TS2972 Apple tv sleeps when computer sleeps. What to do

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George, Your trouble sounds just like mine. You can read my thread here: https://discussions.apple.com/thread/4204561?start=0&tstart=0, but in summary:
Itunes and the Apple TV exchange messages about once per minute. If any wifi interference stops the message-and-reply, iTunes closes the home sharing connection. Other services are usually fine.
I solved my problems by wiring the ATV and computer. (Wiring either alone didn't work.) Home Sharing is now rock solid and works exactly as advertised. No drop-outs during play. The iTunes library is always available on ATV - I never have to restart home sharing or iTunes or the ATV. If a computer or ATV restarts, they pair up automatically.
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Since I upgraded to Maverick when computer sleeps it will not wake up but must be restarted? Also password to icloud is never saved?

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Disconnecting when computer sleeps- will not reconnect

My grandfathers MacBook disconnects from wireless network whenever the computer goes to sleep/is temporarily shut. When it is opened back up, says it is not connected to the internet even though the Network is reading as working. Mail will not send either. The only way I can get it back in gear is running the Network diagnostics or simply restarting the computer.
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OH- "Disconnect from wireless network when logged out" is NOT checked in system preferences

Hello candace171. Welcome to the Apple Discussions!
If he's using Preferred Networks, try the following ...
1. Delete Preferred Network(s)
o System Preferences > Network > AirPort > Configure
o In the "By default, join:" pull-down menu, select "Preferred networks"
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2. Delete AirPort Keychain Entries
o Launch the "Keychain Access" application located in Applications/Utilties.
o Click on the "Kind" filter at the top, and look for any "AirPort network password" entries...and delete them.
o Restart, or log out then back in.
3. Add Preferred Network(s)
o System Preferences > Network > AirPort > Configure
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I am having trouble with the wireless network dropping off every time the computer sleeps. Each time my iMac sleeps from inactivity when I start it up again I get a disconnect message and have to go through diagnostics to get the airport extreme to run again and then everything is fine.
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I searched and couldn't seem to find an answer for this. When my wife checks her mail in the morning after the computer sleepsshe gets the triangle with the exclamation point.
She will click go online and then she can check the mail.
It seems like when the computer sleeps it loses the internet connection and mail does not realize it has recconected when the computer is waked.
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Try this. Upon waking the computer from sleep. Wait about 20 seconds before doing any network activity like Mail or Safari. Then try it.
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thanks,
i read the doc, looked in the system prefs where my re-connect was set to "preferred" and there was only one wpa network listed. i deleted it from the list then re-added per the apple document. will see if this works.
in my own mind i don't think this is the solution but am keeping an open mind. the weird thing about my situation is that after the computer sleeps there are no available networks under the airport menu. i know in fact there are 4-6 in my area. after restarting the 4-6, including mine, networks are all there and my network has been connected to.

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Hi there, Welcome to the Apple Support Forums. What I say is just my own opinion. We all work in many different ways.
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Message was edited by: dechamp

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Hi,
Me thinks you ask just too much from an operating system. It is built this way so that if you are still using an external device, without actually realising the fact at the time of disconnection, it ( the computer ) prompts you as such.
Imagine the posts that would appear if this were not the case?
" I unplugged a drive and now the cat has exploded, the house next door is on fire and aliens are now running around in the local park - Apple are you listening?????? "
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Hey,
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Welcome to the forums!
Your situation is strange. I can answer one of your questions: "Does the computer shut down all open apps when it logs me out?" Yes, it does.
But I don't understand why the computer going sleep would log you out. That is not the standard behavior.
Are you by any chance using "Fast User Switching" or "Parental Controls"?

Disconnect to wireless when computer sleeps

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