Wifi does not automatically connect on iMac

When turning on my imac intermittantly the wifi internet connection does not automatically connect and when this happens i have trouble manually connecting it, resulting in me turning airport wifi on and off upto 5 times.
I am running OSX Lion V 10.7.4.
Any sugestions?

Hi, this has worked for a few...
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
old... http://docs.info.apple.com/article.html?artnum=106653
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
10.7…
System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
10.5.x/10.6.x/10.7.x instructions...
System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
The interface that connects to the Internet should be dragged to the top of the list.
Instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.
For 10.5/10.6, System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
208.67.222.222
208.67.220.220
Click OK.
Also, turn off IPv6:
System Preferences » Network » AirPort » TCP/IP tab » Configure IPv6
Or whatever Interface you use.

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Attachments:
TG862G_User_Guide.pdf ‏2351 KB

If you are having WiFi problems it is necessary to isolate whether the problem is with your network or your iPhone. Note: Do NOT consider your network to be blameless if some other devices can connect to it.
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You have an old model Netgear which does not have Genie. However, the router log should still give you some important information. Next time your phone wont connect, log into the router and check the log for listings with your phones mac address. It should show the phone requesting access and then the router either allowing or denying access and reason why not. If the log does not give this info then you can still intercept the communication by installing a software called Wireshark.
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Probably my rose-colored-glasses mistake again.
I let the ThinkVantage system updater install most of the latest updates last night including the
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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
Furthermore, you may want to avoid giving your network a common name. While the following article (and excerpt) refer to iOS devices, the same applies for your Mac:
Avoid giving your wireless network a common name (SSID)
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.
Therefore, you may want to refer to the following article when configuring your Wi-Fi router:
iOS and OS X: Recommended settings for Wi-Fi routers and access points
http://support.apple.com/kb/HT4199
Thanks,
Matt M.

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