MBA doesn't connect to wifi network after waking from sleep

I just bought a new MBA 13". More often than not, it fails to connect to my wireless network when it wakes up from sleep. This is annoying to say the least. Any ideas?

Hi,
I'm thinking about a trouble with the route table. Try this in a terminal session after startup:
netstart -rn
ping <network address>
After somes answer, close the cover to go to sleep mode.
Open the cover and look the result of the ping command
Normaly you don't have a network
cancel the ping command and redo the netstat commande
Normaly some rows are missing in the result (i don' know why)

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Wifi won't connect to WPA2 network after waking from sleep, requires reboot

My office has a WPA2 network that I use my MBP to connect to. When I go home for the day, I close the MBP and put it to sleep. When I get home and open it, it automatically connects to my home wifi network. I do the same coming back to work and when it wakes up it shows a connection to the wifi network, but whenever I initially do any network task, the connection drops and I am unable to connect until I reboot my mac.
I've tried turning off the wifi before sleeping, then turning it back on, but it does the same thing.
Any ideas?

Hi,
I'm thinking about a trouble with the route table. Try this in a terminal session after startup:
netstart -rn
ping <network address>
After somes answer, close the cover to go to sleep mode.
Open the cover and look the result of the ping command
Normaly you don't have a network
cancel the ping command and redo the netstat commande
Normaly some rows are missing in the result (i don' know why)

Problems with wifi network after waking from sleep

I have recently started using a new wifi network and have had some problems connecting to it. When i first tried to connect it gave a message that said "An error occured while trying to join". After some trial and error, I found that I could connect by going to network preferences, clicking "Assist me...", then "Diagnositcs...", clicking the AirPort dot then continue, then clicking on the network name and continue, then it prompts for a password, but there isnt one so i just pushed continue and all of a sudden it connected. I figured it was functional now, but after waking it from sleep mode, the error message popped back up. The only way I know to connect is through that annoying diagnostics path... What is the Problem, is it the computer or the router or the settings on the admin computer? (by the way, I don't know what kind of router it is, but its definantly not an apple airport)

Sorry to drag this back up, but I may have found the source of the problem, I just need the solution. When I first created settings for the network, it automatically "detected" that the security was WPA2 Enterprise, and knowing there was no password, I just pushed join and it saved it that way. When I go through diagnositics as described before, it lists WEP as the encryption. I had a friend with almost the same problem, but in tiger. They were able to fix it by changing the encryption on the login screen that comes up when you click on the network name from the menu bar. But that screen no longer exists in Leopard, it only goes by previous settings. How do I change the encryption in settings, I'm sure it will fix the problem...

Leopard unable to find preferred WiFi network after waking from sleep

This keeps happening sporadically - I have a WEP encrypted (would use WPA2, but roommate's old iBook can't use it) network with a non-broadcasted SSID. I've entered it into the preferred networks list as the only entry. About maybe once in every 4 or 5 times that I wake the system from sleep by opening the lid, it will fail to find my wireless network and the only way to get it to pick it up again is rebooting the machine. I've even had this happen while sitting right next to the router, so it's definitely not a signal quality issue...
Any ideas?
Ryan

FYI, I had the same issue with Leopard not remembering my preferred network, and tried every suggestion I could find from these lists -- to no avail. I filed a bug report with Apple, who responded by asking me to send a log file to them from my machine.
They wrote back, after having determined it was a keychain problem. To quote Apple:
"Please use the Keychain Access utility (in Applications -> Utilities) to attempt to repair your login and system keychain.
In the worst case, you may need to recreate your system keychain:
sudo systemkeychain -C -f
and then you will need to manually join your AirPort network once to write the password to the system keychain."
FYI what Apple failed to mention is that once in Keychain Access, there is a "Keychain Access First Aid" menu option that I didn't notice until too late. Brute force deletion of the login and system keychains worked for me.
Hope this helps (you and the hundreds of others with this issue)

AirPort does not auto-connect to existing network after waking from sleep

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My macbook pro (lion 10.7.2) takes several minutes to connect to the internet after waking from sleep. Is there any way to make this instant?

Hi
My Macbook Pro 15 inch takes several minutes to be able to connect to the internet after waking from sleep. Does anyone else have this problem and is there a fix?
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Can't connect to any wireless network after waking from sleep

I have a Netgear wgr814 wireless router and a Powerbook 12" 867mhz. A few months ago, every once in a while when the PB awoke from sleep, it would not be able to connect to any wireless networks. My network showed in the airport menu, but the computer would not connect to it. I believe that the network settings show a self assigned IP of 169.x.x.x. Usually I can see 4 networks in the airport menu, but when it gets in this state only mine shows. Nothing I did on the computer side could make the computer reconnect: renew dhcp, restart, reseat airport card, etc.
After trial and error I found that if I restarted my router, the pb would reconnect and all would be well. The problem occurred about once a week for a while. Since resetting the router fixed the problem I thought that it may be my router so I updated the firmware. After doing so, the problem didn't occur for about a month, but now it happens at least once per day. Resetting the router always fixes the problem. I don't have to do anything to the PB. Once the router comes back up the PB obtains its IP and is happy again.
I'll mention that a Dell Laptop on the same network never has any issues and when the PB loses connection the Dell is always fine.
What could be doing this? My PB is over 3 years old, so is the airport card starting to die? That's the only thing I can think of.

hi there
alright.... I tried a bunch of things and I'm not exctly sure what I did that did the trick, but I got the problem solved. I turned off the WPA encryption on the AP. Then I turned it back on with a different password.
I wonder if the first password I had was too short and that was some how causing confusion.

MacBook Pro airport doesn't choose 5 GHz network when waking from sleep

Hi,
I recently set up a Time Capsule [TC] 802.11n (4th Gen) as my airport base station catering for my MacBook Pro [MBP], iPad (1st Gen), iPod (3rd Gen) and BlackBerry 9900. I have it set up in dual-band mode (2.4/5 GHz) with the same SSID, mainly hoping to take advantage of the increased speed of the 5GHz band during Time Machine backups - I get a Transmit Rate of 300 Mbit/s when connected at 5 GHz and 145 MBit/s at 2.4 GHz. Aside from that I don't really care which it chooses to be honest - my internet connection is only 12 Mbit/s. When I start up my MBP from a full shut down within an 'appropriate' distance from the TC, AirPort automatically selects the 5 GHz band and falls back to 2.4 GHz if I stray too far.
The problem arises when I wake my MBP from a sleep (which is pretty much always having closed the lid each time I'm done using it) and AirPort ALWAYS selects the 2.4 GHz band and will never change to the 5 GHz band unless I fully disconnect from the network and then reconnect.
The iPad and BlackBerry both switch happily between the two bands as I move around the house, opting for the 5 GHz when possible and always without intervention so the set-up obviously works.
I think it's a problem in Snow Leopard having read problems around the internet from users who have upgraded from Leopard to SL, most of whom seem to do what I'm thinking, i.e. setting up a different name for the 5 GHz network and putting it higher in the priority list that the 2.4 GHz one, however the solution isn't ideal/elegant and certainly not how it's supposed to work, but I've yet to find a definitive solution from Apple anywhere.
Anyone else having this problem? Anyone found a solution? Anyone heard anything from Apple?
Thanks!

Yes. I'm having a very similar problem. I don't have TC, but I have a netgear wndr4000. I'm always bring my MBP out of sleep and having to manually select the 5GHz band. Even when I know it should. I have different SSID's on each band, and I have tried setting the priority order, but that has another set of problems. When I get a little farther away, it will hook to the 5GHz band at 54Mb, but the 2.4GHz will be at 130Mb at the same distance. I thought it would make some type of smart choice about it.
I had been thinking about moving to a Airport Extreme because I've been told by others that their machines make the correct choice with the SSIDs set the same.
I too am on Snow Leopard, but I'll be upgrading soon.

My iMac won't automatically connect to wifi after waking from sleep mode

After dowloading the newest software update and performing a firmware update for my Airport router, my Imac won't connect to Wifi automatically after waking from sleep mode

Please re-download and install the 10.7.3 update. You can locate it at 10.7.3 (Client Combo). Follow the on-screen instructions. Then test it out, if you still have the same problem please restart, when you hear the startup tone hold down the Option Key and then choose the Recovery Partition. Then open Disk Utilities and Repair Disk Permissions 2x. Then exit DU, restart normally and re-test.

My MacBook Pro won't reconnect to my Wi-FI automatically after waking from sleep mode

Hello, everyone. Since I updated to Yosemite, my MacBook Pro won't reconnect to my Wi-FI automatically after waking from sleep mode.
Does anyone know how to fix that?
Thanks in advance,
Arthur.

Hi, arthurpacifico.
Thank you for visiting Apple Support Communities.
Here are a couple troubleshooting steps that I would recommend trying to see if it corrects this issue.
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/HT3964
Reset your computer’s PRAM
http://support.apple.com/kb/HT1379
If the issue persists, try the troubleshooting steps I have attached below.
Symptom: After restarting or waking from sleep, my computer might not connect to the Internet
After waking from sleep or starting up, your computer may not show that it is connected to a Wi-Fi network.
After start or wake, your computer may indicate that it is connected to a network, but does not connect to the Internet.
Solution
Use these steps if your computer does not automatically connect to your desired Wi-Fi network.
Check your TCP/IP settings in the Network pane of the System Preferences. Click the "Renew DHCP lease" button
Choose System Preferences from the Apple menu.
Choose Network from the View menu.
Select Wi-Fi, then click the Advanced button in the lower-left hand corner of the screen.
Click the TCP/IP tab from the top of the screen.
Click the "Renew DHCP lease" button.
Select the Wi-Fi tab and view your Preferred Networks list.
Select each network and click the minus sign to remove those networks from your Preferred Networks list.
Click OK and close the Network preferences.
Remove your stored network passwords using the Keychain Access Utility.Restart your computer.
Open Keychain Access from /Applications/Utilities. Your window will look like this:
Remove your AirPort network passwords from the login keychain: Select the "login" keychain from the Keychain sidebar. Click the "Kind" column to order the list of keychain items by their type. Remove all entries of the kind: "AirPort network password".
Remove your AirPort network passwords from the System keychain: Select the "System" keychain from the Keychain sidebar. Click the "Kind" column to order the list of keychain items by their type. Remove all entries of the kind: "AirPort network password".
Note: The above steps will remove your Wi-Fi network passwords. If you do not know them, or if your network does not use passwords to restrict access, you should contact your network administrator.
Join your Wi-Fi network. You will need to enter your password for your network again if it requires one.
Wi-Fi: How to troubleshoot Wi-Fi connectivity
http://support.apple.com/kb/ht4628
Cheers,
Jason H.

Can't connect to wifi network after iOS update

Can't connect to wifi network after iOS update.

This does not work in my case.
Situation: we have wifi at home using WPA encryption.
The iPod Touch 8GB connected seamless to this network and anything was ok. After some days i could no longer connect, the iPod told me "connection to network 'networkname here' failed". Deleting the network and reenter the (correct) passphrase was no help, but changing the SSID on the router was helpful: the iPod could connect again ... for several days.
Now things stopped working again. Resetting network settings did not help either.
The iPod can see the network, is asking me for the passphrase and after several seconds telling me: can't connect. On the router log i don't even see a dhcp request, but other laptops work fine with the same wifi network.
That's a mess, i cannot and will not change the SSID every some days just to get the iPod working again.

MBA loses internet connection after waking from sleep

I have a new Macbook Air running Mavericks and new 802.11ac Airport Extreme router.
My problem is that the MBA drops the internet connection after waking from sleep. I tried the solution offered by the OP, but it didn't work.
In my case, here's what I have to do to get a connection again. I open the Network preference pane, and then choose "Assist me..." and then "Diagnostics". Invariably it will show a green light beside Wi-Fi, Wi-Fi Settings and Network Settings. I have 5 bars showing in the WiFi menu bar icon. But ISP, Internet and Server will be yellow.
When I go through the steps prompted by the wizard, the ISP/Internet/Server lights turn green on the third screen where I select the wireless network I want to join.
It seems as if it's connecting to the WiFi network when it wakes from sleep, but losing the internet connection?
Note: I have a new iMac as well running Mavericks and don't have this problem with it.

The warranty entitles you to complimentary phone support for the first 90 days of ownership.
If you bought the product in the U.S. directly from Apple (not from a reseller), you have 14 days from the date of delivery in which to exchange or return it for a refund. In other countries, the return policy may be different. If you bought from a reseller, its return policy applies.

IMac loses WiFi connection after waking from sleep on OSX 10.8.2

Bought a new mid-2011 21.5 inch IMac this week. It is not re-establishing WiFi connection after waking from sleep. Was happening on OSX 10.7 that it came with, so updated to 10.8.2 and same problem exists.
I am running a mid 2012 MacBook Pro with Retina Display alongside, on OSX 10.8.2 and no problems at all. Cannot work out what is causing the IMac to fail and neither can Apple!
Could it be the Netgear Wireless Router 3 years old? Full signal strength!

Me too!
I am on a MAC Pro desktop and I am having the same issues. I go to system preferences and just click the network icon. Then I close mail and when it opens it now sees the network. This is getting very annnoying.

Network connection after waking from sleep

Hi... More or less any time I allow my MacBook Pro to go to sleep, when I wake it up I am nearly always disconnected from my Airport connection (I connect to a NetGear wireless router via my internal Airport card). I go up to the menu bar and click on the now grey airport icon and I do still see my network in the list of available networks. I click on it, after several seconds a message comes up that says "there was an error joining the Airport network "network name""... But I then simply click on OK (rather than Try Again, I've learned that by trial and error) and the network reconnects just fine... Then when I let the machine sleep again at some later time, I do that all again... Any suggestions of what might be going on??? I do have "Use Interference Robustness" turned on (not that I know why exactly) but I've also had it off before and that seems not to matter... Any suggestions??? thanks... bob..
FW800 G4 dual 1.25 Ghz and 17 inch MacBook Pro Mac OS X (10.4.8)

I have "join preferred networks" selected, and mine os the only one on the list, and it still does not connect after waking from sleep. It is WEP security, not WPA2. I checked out the following article, but it was of no help:
http://docs.info.apple.com/article.html?artnum=304482

Losing WiFi connection after waking from sleep

I've iMac 27 in. with recently upgraded OS X Lion to 10.7.4. After this was done the problems strated with connecting to Wi-Fi through my Time Capsule (2TB, 802.11n 4th Gen) after waking from sleep. Everything works fine when iMac is started after shutdown. My internet router is connected through ethernet cable to Time Capsule and iMac is using Wi-Fi connection with Time Capsule.
I've tried to install iMac Wi-Fi update v1.0 but it I cann't do it because my OS X is 10.7.4 and the update installer is stopping the installation after the check of my OS version.
Could anybody help to solve this problem, please?

but when the
computer goes to sleep and is then awakened, there
are no wireless networks listed in chooser... like
there are no wireless networks available...
Hi greaser5!
That is definitely NOT typical operation. Yes, your Core Duo iMac must restart after sleep, but It should reconnect to a working network instantaneously (less than a second), although it will probably take longer than that for your iMac to fully restart after sleep and actually be able to use the network.
Delete all prior wireless configurations that you have saved on the "Location:" selector of the Network panel of System Preferences. On the Network>AirPort>AirPort panel also delete all your preferred wireless networks. Click the "Apply Now" button.
Restart your Mac. Turn on AirPort. Use the Network panel's "Assist me..." button and the following blue "Assistant..." button to configure a fresh wireless connection to your working wireless network. This will be fresh and total, just as you did when your iMac was new. There is no need to give your network either a new name or a new password, as the old ones will work just fine in the new configuration, since as you know, the current network is working fine, the iMac simply can no longer connect to it correctly using its current configuration.
I have not been able to test the above on a Core 2 Duo, so do not know first hand if it will make any difference on those iMacs, but that or some similar fiddling should resolve the issue.

MBA doesn't connect to wifi network after waking from sleep

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