10.6.7 fails automatic connection to wireless

Since the 10.6.7 update on my early 2010 MacBook Pro, I have had unreliable networking. I move between home and work, wireless and wired. The wireless configuration is saved, and it previously quickly and automatically connected. Now, at each site when I first connect to the network, it doesn't make a connection and on wireless it doesn't automatically connect. I have to repeatedly disconnect and reconnect wireless or unplug and replug in the wire.
This latest time on the wire, I tried four times, and it still would not connect. So, I tried turning wireless off and on, and the wired then connected. Before, I only tried unplug/replug the wire, and that worked.
I've looked at the networking configuration, and the IP address and DNS are correct. But, I cannot connect to the network. No web browsing, no email.
It looks like 10.6.7 introduced a fault in networking related to connecting wirelessly.
Has anyone else seen this? Any insights?
Thanks,
==Leonard

It might help to reset the connection settings on your Mac using these steps one at a time until the problem is resolved, recognizing that, depending on your problem, not all of these steps will make sense:
1) Use the AirPort menu bar item to turn AirPort off, then on again.
2) Try to select your Wi-Fi network from the AirPort menu.
3) In the Network panel of System Preferences delete the AirPort item from the left column, then add it back.
4) In the same panel as (3), define a new location and see if you can make that work.
5) In the same panel, select the AirPort connection item, click the "Advanced" button, select the "TCP/IP" tab, then click "Renew DHCP Lease". Note that the fix this step implements may be temporary.
6) In the folder /Library/Preferences ( _not_ <yourhomefolder>/Library/Preferences), move the folder SystemConfiguration onto the Desktop, then restart your computer. See if you can now make your AirPort connection work.
These steps may not help, but they'll only take a couple of minutes to try. Before you try these, if you have any special network settings on your Mac for things like DSL credentials, note all your network settings, because the latter steps will destroy them. If you got all the way to the last step, if things don't work any worse than before, you can trash the saved SystemConfiguration folder.

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Automatic connection to wireless network

In FreeBSD I had my wireless connections set up in wpa_supplicant.conf and in rc.conf I had someting like: ifconfig_ath0="WPA DHCP". Nothing else. It would automatically connect to the first available network (according to the settings in wpa_supplicant.conf). I believe it also automatically switched over to another network, as I moved arround with my laptop.
In Arch I tried the same thing, but I don't think it understood wlan0="wpa dhcp" in rc.conf, because it didn't work. It surprises me that it doesn't seem to be as simple as that.
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2) With netcfg I have a long waiting time while wireless profiles fail at boot - one after another. Can I have netcfg do it faster - perhaps by having it do a scan and NOT try to connect to networks that aren't even in the scan results?

1) Briefly, no. More specifically, you will need netcfg, wicd, networkmanager, or some other similar utility to automate wpa connections. I'm not familiar with FreeBSD, but based on the information provided, I'm absolutely certain that it is using scripting similar to netcfg. The only difference seems to be that they provide it by default, whereas Arch allows the users to install it or not as required.

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http://forums.macosxhints.com/showthread.php?t=61850
http://macosx.com/forums/mac-os-x-system-mac-software/281192-mac-will-not-automa ticcaly-connect-wireless-network.html
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I am having the same issue here. I have followed the suggested fixes, to no avail. Here's a run down of my symptoms, attempted fixes, and the "fix."
when coming out of sleep, my wireless connection no longer works. i can connect to a neighbors, but when i attempt to switch back to mine, nada. airport status shows it is connected with full reception. no internet. no network connect. i got nada.
rebooted the router. nada. rebooted the cable modem. nada. rebooted modem, then the router. nada. (d-link DI-624. also had the Linksys WRTXXX)
attempted this fix: http://docs.info.apple.com/article.html?artnum=304482 nada
in order to establish a connection, i go through the following:
- when the macbook comes out of sleep, i open safari and get the network diagnostic screen prompt.
- i turn off airport, shut down safari, then turn airport back on.
- reopen safari and get the network diagnostic prompt.
- go get a cup of coffee, nature break, etc.
- come back and my internet start up page is USUALLY waiting on me.
the problem with this, is that the connection is usually DROPPED five to ten minutes into the connection and everything above is REPEATED.
my solution? as much as i hate to say it, use the PC. it doesn't have this problem. Apple needs to address this issue with a firmware upgrade NOW.
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Hi sashton,
When troubleshooting Wi-Fi connectivity issues, I find the following resource has the most relevant information:
Troubleshooting Wi-Fi issues in OS X Lion and Mac OS X v10.6
http://support.apple.com/kb/HT4628
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http://support.apple.com/kb/HT4450
If you were to give your wireless network a common name (SSID), users of your network who use iOS devices [sic] and are away from your network would run the risk of joining a different network with the same name. Having joined the unexpected network, they would be exposed to potential data theft.
Because of this security issue, Apple maintains a list of common or ambiguous SSIDs, including the default SSID for many commercially available access points, as well as the SSIDs "wireless" and "default". If your network's name is on the list, any iOS device [sic] that joins the network stores the access point's BSSID and associates it with the network's SSID. Subsequently, it will only auto-join the network if the access point's BSSID matches the information the device has stored. This avoids joining a different network with the same name.
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Ugh! I was hoping to avoid having to do some UNIX hacking, but since no one else has piped up, I figured out a semi-reasonable way to do it.
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<key>RunAtLoad</key>
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Then, in your home directory, make sure that you have a "bin" folder for storing scripts. Create a file therein called join-wifi.sh that contains this:
#!/bin/bash
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Do you think some more information might help?
Start with telling us your chipset. Check with lspci -nn (That would be two n's, not m)
Also, is it your router? Is it encrypted? WPA? WEP?
Can you see it with iwlist scan
Can you associate with the access point by hand?
Is there anything interesting in the journal (or logs)?
What DE are you using?
Is the WAN blocked? (Check with rfkill list)
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I have an epson xp600 and a mac book pro. Wireless printing is OK if I'm lucky for one time only then a 'failed to connect' message so I have to delete and re add the printer to get it working again (but just once!) then the same occurs. Why?

I have an epson xp600 and a mac book pro. Wireless printing is OK if I'm lucky for one time only then a 'failed to connect' message so I have to delete and re add the printer to get it working again (but just once!) then the same occurs. Why?

I am not certain this will fix your problem but I suggest you assign the printer a static IP address.
Using the printer's front panel, select Menu > Network > WLAN > TCP/IP > Boot method, and change it to "static". Provide a static IP address that is on your LAN's subnet.
For example, if you are using an AirPort Extreme, you might give it an IP address of 10.0.1.100. If you are using a Netgear or Linksys router that defaults to issuing 192.168.x.x addresses, you might give it an address of 192.168.1.100. That way, the printer will always "reside at the same address" on your network. If your router has the ability, you should reserve that address so that the router does not attempt to assign it to another DHCP device.
Then, go to System Preferences > Print & Scan, and delete your existing printer with the "–" (minus) button. Add it again, using the "+" (plus) button. In the window that appears, select the IP pane, and from the Protocol menu select "Line Printer Daemon (LPD)". In the Address field type the IP address you gave your printer.
If all goes well the "Pring Using" field will detect the printer at that address and automatically select the appropriate driver. You will see something similar to the following screenshot ("name" can be whatever you decide, and "location" is optional):
Click Add, then you can close System Preferences.
There are other possible reasons your printer is "not responding" which could include wireless interference from competing wireless networks, but try this "static IP" method first. It should mitigate the problem.

Macbook pro doesn't automatically connect to my wireless network

I have set up my network preferences with my wireless networka the top of the list. This used to ensure I automatically connected, but now I have to manually connect everytime I wake my computer.

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I've had this same thing for months now and I have no idea why. I do know that it started right around the time that I upgraded my iMac to Snow Leopard, but laptop (Pro) is still just regular old Leopard and it happens with it as well. I've tried everything - the approach in the previous reply to your question included - and have still had no luck. I tried all the old (2008, etc.) apple discussion forum stuff too. No joy. Please let me know if you figure it out because at this point in time I've tried everything I know. Granted, selecting a network every time I power up or wake a computer from sleep is not going to kill me, it's just....annoying.

10.6.7 fails automatic connection to wireless

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