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where are the network configuration files located for MAC OS X leopard and tiger

Hi -

A user of mine moved to a new location which required a new subnet. He tried to change the configuration himself and now  his network settings are completely messed up. I can't even get into the network utility to change it.

So, I am looking for the network configuration files from the command line for leopard and tiger. Similar to linux /etc/sysconfig/network-scripts ... Obviously its a different OS and things are done differently but if the files do exist can you please tell me where, or how network info is stored?

Like I said I tried to change via the network utility but upon opening I get a "the network settings have been changed by another application" I hit cancel and immediately the message comes back up... So its almost like the network utility is hung and I don't know how to fix it...

Any help would be greatly appreciated

1 Solution
See if this helps... it's a fairly encompassing article on the problem.

bayroot21Author Commented:
1)      As soon as you get the looping message, Force Quit the System Preferences application.
2)       Re-launch the System Preferences application and open the Sharing pane (_not_ the Network pane)
3)      Check and if necessary restore your sharing settings (from your back up records), then close the Sharing pane and open the Network pane. The looping should now be gone
4)      From the Location tab of the Network pane, choose "Edit Locations&". Duplicate your active Location, call the duplicate say, "Location Copy 1" then delete the original.

I was having the same problem with the looping pop-up message "Your network settings have been changed by another application" until I just hit the enter button for "OK" and then immediately afterward clicked the padlock shut with a mouse click before the pop-up message could appear again. Everything working fine now

I used the following solution and have had a positive result. BTW, I'm using my Airport to connect to the network. Open your Network prefs panel, and using the "two handed approach" in under the Airport tab, click the Options button. This brings up a dialog box for Airport settings. Now click the Restore Defaults. Problem goes away.

"This currently reported problem, which manifests after applying Security Update 2008-06, can be fixed permanently by removing the following preferences files:
Go to Library/Preferences/SystemConfiguration and delete the following (suggest make copies to the desktop first if in doubt):

My latest, apparently successful, attempt follows the suggestion of Dan C... posted on Sept 17. I can not be sure which steps are critical, but they included:
"      Running System Preferences - Network and clicking the lock to allow changes
"      Using the Location pull-down Edit Locations selection and deleting all locations but one (for me it was one that used only FireWire)
"      Using the Location pull-down Edit Locations selection to create a new location that used Airport - using a different name for that location than the one that I used previously
"      Using the Show Airport choice and Edit action to specify my own Airport network, and only that network
"      Highlighting that network selection and selecting Edit - at which point I observed (after checking Show password) that the password had been corrupted - and entering the correct password - somewhere around this step, the correct internet connection may have been made
"      Using the Location - Edit Locations to Rename the Location to be the same as I used previously (I recall that this solved an earlier unsuccessful attempt to use the previous Location name without deleting it first).

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