Currently Being ModeratedMar 24, 2013 12:42 PM (in response to Luddboll)
Change your router channel number. Most times this works & is all you have to do.
Click the Assist Me button.
In the next window that pops up, click the Diagnostic button & do the necessary.
Research Knowledge Base for network problems that pertain to the OS that is currently installed on your computer. See these basic networking KB Articles: http://support.apple.com/kb/HT1401 AirPort troubleshooting guide
http://support.apple.com/kb/HT2712 Using network locations in Mac OS X
http://support.apple.com/kb/HT1714 Solutions for connecting to the Internet, setting up a small network, and troubleshooting
What to do when you can't connect to the Internet Also, run the Airport Utility app which is located inside the Utilities folder.
If using Apple's Airport, please re-post over in one of the AirPort Forums.iMac (3.2 GHz, Intel Core i5-2013), OS X Mountain Lion (10.8.3)
Currently Being ModeratedMar 24, 2013 2:52 PM (in response to Baby Boomer (USofA))
Thanks for your info on my problem!
I forgot to say that switching WiFi off and on again hooks up the connection, and then it works flawlessly.
It's just the automatic connection at startup that fails.
I'll try the solutions as soon as time allows.
Currently Being ModeratedMar 25, 2013 1:49 PM (in response to Luddboll)
I have exactly the same problem. At startup the computer fails to connect to the wi-fi automatically.
If I switch off the wifi and then on again, it connects easily.
The connection is not lost if the computer stopped (stand by) instead of shutting down.
I have also tried assigning manually the DHCP, as I noticed that at startup it fails to obtain the IPV4 address automatically, but the problem remains.
I have noticed the problem after installing 10.8.3. My computer is a retina MBP 2.3 GHz
Could you solve the issue in some way?
Currently Being ModeratedMar 25, 2013 3:21 PM (in response to peppe)
Now I've tried all suggested solutions, all channel numbers and resetting PRAM.
No difference at all, and luckily no problem added to other 6 WiFi stuff around.
Not even the grumpy old bridge from the TV made a fuzz, only the MBP retina...
I hope Apple realize the risk of ignoring users that buy their "premium" line!
Sorry, I forgot to say...I didn't find any other solution either...
Currently Being ModeratedMar 27, 2013 5:51 PM (in response to Luddboll)
I have the same problem too on my brand new 13" Mabook Pro.
It was fine until I did an upgrade, and now people have pointed out here, I have to stop the wifi and turn it on again for the connection to establish.
Looks like a update bug.
Currently Being ModeratedMay 11, 2013 3:56 PM (in response to Luddboll)
I'm having a similar issue with my 2009 iMac (MID) running 10.8.3. I am using a Linksys E2500 router.
On start or wake up I have to select my wifi network every time and enter the password. I check the box to remember the network but it never does. I keep getting the message that it cant find any preferred networks.
As long as the Mac stays on and doesnt restart or enter sleep mode it works just fine.
If the computer enters sleep mode it does not connect upon waking up. Again I have to select my network and enter password. I have to do this every time.
If I turn off wifi and turn it back on it does not solve the issue. I again have to select the network as it forgets every time the wifi card is turned off.
I have tried several steps to correct the issue including deleting all preferred networks, renewing DHCP lease.
I have reset the router several times. I cant figure this out.
Apple support refered me to Linksys support who wanted to charge me to fix the issue that they say is an Apple issue not the router.
My 2011 (Late) MacBook Pro running 10.8.3 does not have this issue. We have a HP Envy, 2 PS3's, 3 iPhones, and an iPad and all connect just fine.
Anybody having this issue? Any suggestions?
Currently Being ModeratedJun 7, 2013 2:21 PM (in response to strikemannt)
Tried that too, but no success.
I didn't have to enter the WiFi password after having deleted the old entry, which makes me suspect that the system didn't delete all info related to the network. That's very strange to me.
I'm waiting for the result of the 10.8.4 upgrade, and concider a system reinstall if the problem persists.
Currently Being ModeratedJun 15, 2013 9:33 AM (in response to Luddboll)
I found a solution that has worked for me.
I entered in Utility Airport, selected my Time Capsule, then Modify, Wireless tab, Wireless options and finally selected a channel instead of leaving on automatic.
I selected channel 36 on the 5 GHz. However, do not think it is important which channel you select as long as there are no interferences.
So far so good
Currently Being ModeratedJul 7, 2013 6:15 AM (in response to Luddboll)
I was able to fix the issue for myself. I am running OSX 10.8.4
Step 1: Go to Applications >> Utilities >> Keychain
Step 2: Locate System in the left menu and select it.
Step 3: Locate your wireless newtwork in the list select and delete the entry. You will be asked to enter your system password to delete.
Step 4: Click on your wireless icon and select Turn Wireless Off then click open network preferences.
Step 5: Under your wirelss select advanced
Step 6: Delete your wireless network under Preferred Networks
Step 7: Turn wireless back on
Step 8: Connect to your wireless network and re-enter your security information.
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