Possible Wifi Solution
Hey guise,
This is my first post here at MacRumors. I registered just to let you all know of what solved my problem. Also, the problem is surrounding my very first piece of Apple hardware: MacBook Pro Retina 15".
Symptom:
Upon every wake, prompted with preferred networks screen (had to manually select my 'linksys' connection every time).
Solution:
What fixed it for me? After going into [Apple Logo Menu] > System Preferences > Network > Advanced..., I realized that the 'linksys' network on that list was not secured (i.e. Security: Open). However, my router requires a WPA key. So I removed that 'linksys' Open connection and manually added it again with the Plus [+] button. I dragged it up to the top, clicked OK and Apply. Finally, I tested it out by putting the laptop to sleep and waking it back up. To my great satisfaction, I was automatically connected with no sign of that prompt!
Really hope this solves others' issues. It may not fix everyone's automatic network detection problems, but it should do the trick .. had your Mac learned your network without a key or possibly a key has been changed.