I've tried that already also, every time the MacBook goes to sleep, when it wakes up, it will show the wifi searching icon in the bar, then all the signal strength bars will go grey as if there is no connection. I have to go to that wifi menu in the bar and click on my access point to get it to actually connect. This issue happened after upgrading to 10.8.4
Yes its in the preffered networks, I tried all the things i've seen, Keychain, plists etc and still it wouldn't reconnect after sleep.
When asked for my password when connecting to wireless if i put it to remember it says connection failed, if i unclick the remember it will go as usual with no issues. but when i put my mbp to sleep if i wake it it will not automatically connect to the internet i have as my favorite. it seems to be an issue with mountain lion 10.8.4 it only happened after i updated to the 10.8.4.
But it wont automatically reconnect after waking from sleep as usual idk what the problem is im thinking its something to do with the OS and Apple hasnt found a fix for it.
I recently had the same issue you were having where my computer would force me to manually select my preferred network. I found your thread and read a few other articles online and was able to fix the problem. I hope you have solved the issue by now, but if not this article helped me: http://www.askdavetaylor.com/how_to_have_mac_autoconnect_wifi_network.html
Essentially all I had to do was delete my network from the preferred networks list and then ad it back. After this my problem was solved. Hope this helps with your problem.
I've tried it all still nothing has helped. Still I have to manually connect to my preffered network and still it will connect and say connection timed out, BUT HERE'S THE KICKER, it stays connected with no issue it just wont automatically connect i feel as if its a software issue from Apple and nothing more. I just hope they figure it out and fix this i hate how the update is for 10.8.4 this is crappy.
All I want is to automatically connect to my preffered network when i turn on or wake my MBP and nothing I've seen works.
I had the identical issue after upgrade to 10.8.4
The recommendation to simply delete my network and re-add it didn't work. And the down side of deleting com.apple.network.identification.plist is that you lose all your Network preferences.
An alternate, less destructive fix that worked for me: add a location, change to that location. Bam. Done.
>SystemPreferences >Network > Location > Edit Locations +to add a new location, Apply, then Reboot.
I kept all my preferred networks intact AND solved the issue of Wifi not connectiong automatically.
Not sure what the root issue is, and that bothers the geek in me, but having lost my Saturday Morning trying different solutions, I'm going to let that sleeping dog lie and be glad it's working. ;-)
I finally fixed this annoying issue. Here is what I did (I'm not sure which step actually fidex the problem).
Remove all networks.
Remove all wifi passwords stored in keychain.
Re add the network(s).
(still not connecting after waking up from sleep at this point)
Update OS to latest version 10.8.4
Bazinga it WORKS!!!
I had tried deleting and the network several times before, to no avail.
This is what I noticed:
On the 'Advanced' page where it lists all the networks, notice the entry in the Security column.
For mine it said 'None', this was even after I had picked WPA2 Personal and added the password several times before.
Here is what worked:
I deleted the offending network, while adding the new network selected the security type as "Any (Personal)", entered the password and saved. Now the security type says "Any (Personal)" and the network starts on wake up from sleep
I finally found a solution to my issue it turns out in my 'Keychain' I didn't have the airport password saved under the 'system' keys. This as of now has solved my issue. This is what I did.
"Go to Keychain Access and remove all airport passwords for this network from Login and System keychains.
Then create a new password in System. Enter as password the network password. Item Name and account name: name of the network. Click add. Then double click the new item in list. Change kind to 'airport password'. Then click Access Control and select Allow all applications to access this item.
Restart your computer if it doesn't joins automatically join it manual, next startup it will works fine again."