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iMac: unable to connect to local wifi router

Posted on 2008-10-13
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Last Modified: 2012-06-27
The problem is being unable to wirelessly connect to a local wifi router, which has no encryption.  
The iMac does not see any nearby networks.  However, my windows notebook  sees 2 nearby networks, and is currently connected to the local wifi router.
The local router is a Linksys WRT54G.


When I click on the wifi symbol on the iMac, a menu is displayed:
Turn AirPort Off
No network selected (greyed out)
Other ...
Create Network ...
(checked) Use Interference Robustness
Open Internet Connect ...


What I want to see is a list of nearby networks that can be chosen, but have not yet been able to make that happen.


If I try to define a Closed Network with the proper name and no wireless security, an error box is displayed:
  "there was an error joining the Airport network "networkname".

If I try to define a new network, a "Computer-to-Computer" box is displayed.  The Name is already prepopulated with a descriptive name of the computer, and Channel is Automatic (11).

If I open Internet Connect, an "AirPort" box is displayed.  AirPort Power: On.  Network: No network selected.  Signal level is zero.  Base Station ID: Not Available.  (checked) Show AirPort status in menu bar.  Status: Not associated with any network, status not available.


OS is Mac OS X  Version 10.4.11
Processor: 1.6Ghz PowerPC G5

AirPort Card Information:
Wireless Card Type: AirPort Extreme
Current Wireless Network: wireless network not available

The Network Utility reports:
en1 is the wifi adapter
IP Address: 144.3.8.0 (--> strange, because my windows wifi adapter gets 192.168.1.107)


ifconfig shows the following for en1:
flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether (mac address)
media: autoselect (<unknown type.) status: inactive
supported media: autoselect


Your help is greatly appreciated!

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Question by:ChrisEddy
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strung earned 500 total points
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Try downloading and opening iStumbler and see if it shows any active networks. If not, my guess is that the antenna has come unclipped from your Airport card.

iStumbler:  http://www.istumbler.net/
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by:strung
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Which model iMac do you have?
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by:ChrisEddy
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The antenna cable was indeed disconnected.  And thanks for the tip on iStumbler, interesting and useful tool.  
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