In article <c56h1h$4cp$oit.duke.edu>,
Katheryne Doughty <edu> wrote:
Try going in to "System Preferences -> Network"
Click on Airport
Click on "By default, join".
Enter your own WiFi's SSID name.
I had this problem myself. I have 2 WiFi access points in my house, and
just after Christmas 2 neighbors got WiFi as presents and the next thing
I knew I was connecting to their system and not my own. I was closer
and stronger, but it choose the weaker signal from across the street
over my own 2 access points.
If you can not connect to your own WiFi access points, then consider
that maybe the new WiFi access point is either using the same channel as
you, or the channel they choose is very close to the channel your WiFi
is using (802.11 WiFi channels overlap about 2 and a half channels on
either side of the channel you are using. So if nothing else works, try
changing the channel you are using to something else.
Also go to http://versiontracker/macosx and download MacStumbler and
APgrapher. These are 2 tools that will help you with seeing other
access points and the strength of signals.