Here is the scoop: In the folder SystemConfiguration there are 4 plist files. com.apple.nat.plist com.apple.PowerManagement.plist NetworkInterfaces.plist preferences.plist After deleting them, I re-start the computer. At that point only one plist file is restored: NetworkInterfaces.plist When I open Safari it tells me that I am not connected to the Internet and then through a dialogue box it helps me find the existing connection, but that fails. The second time around, I went into system preferences/network and recreated the connection myself. At that point a new plist file: preferences is created in the folder SystemConfiguration Now we have two plist files: NetworkInterfaces.plist preferences.plist I start Safari and it crashes. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://listserver.themacintoshguy.com/pipermail/x4u/attachments/20070630/475f756a/attachment-0001.html