On your MacBook Pro do the following:
1a. Delete Preferred Network(s)
- System Preferences > Network > Wi-Fi > Advanced > Wi-Fi tab
- Under "Preferred Networks," delete the network(s) you regularly use from the list.
1b. Delete AirPort Keychain Entries
- Launch the "Keychain Access" application located in Applications/Utilties.
- In the windows on the left side: Select login for Keychains and "All Items" for Category.
- Click on the "Kind" filter at the top, and look for any "AirPort network password" entries...and delete them.
1c. Add Preferred Network(s)
- System Preferences > Network > Wi-Fi > Advanced > Wi-Fi tab
- Add the preferred network(s) using the "+" button.
- Restart or log out then back in.
2. Move System Configuration Files
(Note: You will have to reestablish your network connections settings.)
- Go to /Library/Preferences
- Move the SystemConfiguration folder to the desktop.
- Restart your Mac. (Note: OS X will rebuild the files that are now sitting on your desktop. If this doesn't resolve the issue, you can move the folder back to it's original location.)
