Suddenly can't connect to wifi

Wifi had been working fine on my macbook and both of my roomates' macbooks until last night, when they all stopped working. This morning one of them could connect to the internet again, but the other two can't. I've already tried restarting the router and the modem, reconnecting the modem, restarting my computer, deleting and adding "Airport" in system preferences//network, and deleting the system configuration folder and restarting. Nothing has worked so far - is there anything else I can do?

Try putting these numbers in Network>TCP/IP>DNS Servers, for the Interface you connect with...
208.67.222.222
208.67.220.220
Then Apply. For 10.5/10.6 Network, highlight Interface>Advanced button>DNS tab>little + icon.
DNS Servers are a bit like Phone books where you look up a name and it gives you the phone number, in our case, you put in apple.com and it comes back with 17.149.160.49 behind the scenes.

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Ipad2 suddenly can't connect to wifi - password help ?

Hello
We've had an ipad2 for about 2 months. We got it connected to WiFi fine by putting in the security key from the Livebox modem and everything was hunkydory. Then we went on holiday for a fortnight and when we got back, there was no way of connecting it to WiFi. It asks for the Livebox password, a maximum of 21 characters. The security key is 26 characters long so it isn't that. I've entered every password we own (from the original ISP/Livebox signup letter) and none of them work. I read in a few places online about changing the security option from WPA to WEP, I did all three options but nothing changed. I also rebooted the modem - no change.
I phoned Orange (our internet provider) to ask for help and they said that the password is always the security key. When I said that that was too long, they said that there is no such thing as a Livebox password so they couldn't help me.
There are lots of people asking the same question on the Orange forum (I'm in France) but no solution. Some people said that it comes back all by itself after a few days but it's been 10 days and we still can't connect.
Help !! Thanks in advance !

Does the Router have a common default SSID like "linksys" or such?
Go to System Preferences
Click Network
Highlight AirPort and click Configure...
Choose “By default, join: Preferred networks”
Select your access point and Remove your access point with the minus button.
Launch your keychain access in Utilities and delete your access point keychain entry.
Reboot
Go back to the “By default, join:” page and click the plus this time to add your access point. Enter the correct password, save, reboot.

MacBook suddenly can't connect to wifi

I have been using the same wifi at home for three years, and suddenly today I am not able to connect. My iPad and phone are all able to connect to the wifi except my laptop. It started when I was in queue for playing League of Legends, but I had to force quit out when I couldn't load. immediately afterwards is when the problem started. The airport sees the router, but can't log in to it. I've tried everything to resetting the router, renewing my DHCP lease, deleting all the airport plists in Library/SystemCknfiguration. It seems like I can't log in to any networks as I tried connecting to my mobile hotspot which did not work.
My MacBook is late 2014 15 inch on 10.9.4 Mavericks.
Any ideas to fix this?

Hi,
Do you have an Airport base station, such as Airport Express or Airport Extreme, or a third-party wireless router?
If a router, unplug it for a while and then reconnect. Try Airport Utility again.

I have a macbook air, have never had a problem with it, but all of a sudden can't connect to wifi. Says "ip address fail". Any suggestions?

I've also tried network idagnostics, it can never get further than ISP. Sometimes ill get lucky and it'll connect, but the connection *****. I know the internet itself is working cause the other computers in the house are working fine. Help!

Thanks Bob, I don't know why but it all of a sudden worked a few days later. It's a mystery but at least problem solved.

TS1398 my wifi button doesnt work. Can't connect to wifi.

My wifi button doesn't work. Can't connect to wifi suddenly..

yes, ive restarted it several times.. still doesnt work. ive also tried resetting network settings.. still didn't work.. ive just updated the software last week..

TS1398 have been connected to my wireless network using a netgear sky broadband router succesfully for a few weeks, suddenly can't connect, network is showing but no signal - all other wireless gadgets are connected just fine - including iphone - any idea

my ipad 4 has been connected to my wireless network using a netgear sky broadband router succesfully for a few weeks, suddenly can't connect, network is showing but no signal - all other wireless gadgets are connected just fine - including iphone - any ideas?

Some things to try first:
1. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
2. Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
3. Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
4. Go into your router security settings and change from WEP to WPA with AES.
5. Renew IP Address: (especially if you are droping internet connection)
    •    Launch Settings app
    •    Tap on Wi-Fi
    •    Tap on the blue arrow of the Wi-Fi network that you connect to from the list
    •    In the window that opens, tap on the Renew Lease button
~~~~~~~~~~~~~~~~~~~~~~~~~
iOS 6 Wifi Problems/Fixes
How To: Workaround iPad Wi-Fi Issues
http://www.theipadfan.com/workaround-ipad-wifi-issues/
Another Fix For iOS 6 WiFi Problems
http://tabletcrunch.com/2012/10/27/fix-ios-6-wifi-problems-ssid/
Wifi Doesn't Connect After Waking From Sleep - Sometimes increasing screen brightness prevents the failure to reconnect after waking from sleep. According to Apple, “If brightness is at lowest level, increase it by moving the slider to the right and set auto brightness to off.”
Fix For iOS 6 WiFi Problems?
http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
Did iOS 6 Screw Your Wi-Fi? Here’s How to Fix It
http://gizmodo.com/5944761/does-ios-6-have-a-wi+fi-bug
How To Fix Wi-Fi Connectivity Issue After Upgrading To iOS 6
http://www.iphonehacks.com/2012/09/fix-wi-fi-connectivity-issue-after-upgrading- to-ios-6.html
iOS 6 iPad 3 wi-fi "connection fix" for netgear router
http://www.youtube.com/watch?v=XsWS4ha-dn0
Apple's iOS 6 Wi-Fi problems
http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
~~~~~~~~~~~~~~~~~~~~~~~
How to Fix a Poor Wi-Fi Signal on Your iPad
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-A-Poor-Wi-Fi-Signal-O n-Your-iPad.htm
iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
How to Fix: My iPad Won't Connect to WiFi
http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
iOS: Connecting to the Internet http://support.apple.com/kb/HT1695
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Connect iPad to Wi-Fi (with troubleshooting info)
http://thehowto.wikidot.com/wifi-connect-ipad
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

Can't connect to wifi as hardware cannot be found

Hi, I m using MacBook and all the while I m able to connect to wifi. However, just 2 days ago, I can't connect to wifi all of a sudden? When I check the wifi icon on the desktop, it says "wifi no hardware installed". Tried going to System Preference to turn it on but the button does not respond to on the wifi. Does anybody know how to resolve this? Thank you

Might be corrupted network preferences ...
Open the Finder. From the Finder menu bar click Go > Go to Folder
Type or copy paste the following:
/Library/Preferences/SystemConfiguration
Click Go then move all the files in the SystemConfiguration folder to the Trash.
See if that makes a difference.
Your Mac will generate a new SystemConfiguration folder for you.

IPhone 4s and can't connect to wifi,wifi is grayed out and says "No wifi".FREEZER TRICK WORKS!

I have iPhone 4s wchick cannot connect on wifi,wifi is grayes out and says"No wifi",i restart my phone,i reboot it and finally i restore it the problem remains,i put it on a freezer for more than 5 minutes and works for 1-2 minutes,but when outside temperature returns on the phone still can't connect on Wifi!what to do?
Anyone having the same problem?My iPhone 4s its not 6 months old!

Try restoring your phone usng DFU mode. Here are steps to get DFU Mode: Open iTunes on computer. Connect iPhone to computer. (some turn off iPhone here, I do not) Hold both home and power buttons for exactly 10 seconds, release power button, keep holding home button until iPhone recognizes iPhone in Recovery Mode. Usually takes 10-20 seconds of holding the home button. If the iPhone screen is black (blank) the iPhone is in DFU Mode.

Can't connect to wifi following upgrade to OS 2

I've just upgraded my blackberry playbook to OS 2 and now I can't connect to wifi. Previously save connections are no longer present. Connection attempts don't go past 1st attempt of three.
I've tried broadcasting the ssid and turning off the access control list.
Any ideas on how to fix?
Thanks,
Solved!
Go to Solution.

pedrocadiz wrote:
I've just upgraded my blackberry playbook to OS 2 and now I can't connect to wifi. Previously save connections are no longer present. Connection attempts don't go past 1st attempt of three.
I've tried broadcasting the ssid and turning off the access control list.
Any ideas on how to fix?
Thanks,
Could you please give spec like router make and model, what security mode, what mode as far as being b/g/n
Be a Shepard and not an iSheep.

My iPod 5 can't connect to wifi. It connects to personal hotspots but no to my home wifi. I tried resetting the network settings but no change. I put the right password but it just keeps loading forever. What should I do??

My iPod 5 can't connect to wifi. It connects to personal hotspots but no to my home wifi. I tried resetting the network settings but no change. I put the right password but it just keeps loading forever. What should I do??

Does the iOS device connect to other networks? If yes that tend to indicate a problem with your network.
Does the iOS device see the network?
Any error messages?
Do other devices now connect?
Did the iOS device connect before?
Try the following to rule out a software problem:
- Reset the iOS device. Nothing will be lost
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Power off and then back on your router
.- Reset network settings: Settings>General>Reset>Reset Network Settings
- iOS: Troubleshooting Wi-Fi networks and connections
- Wi-Fi: Unable to connect to an 802.11n Wi-Fi network
- iOS: Recommended settings for Wi-Fi routers and access points
- Restore from backup. See:
iOS: How to back up
- Restore to factory settings/new iOS device.
If still problem and it does not connect to any networks make an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem.
Apple Retail Store - Genius Bar

I hate the new operating system. Can't connect to wifi in home anymore even after a restore. Rhapsody no longer works on my phone either. Plus the brighth graphics are bothering my eyes even with brightness turned down. Any ideas on why rhapsody doesn't w

I hate the new operating system. Can't connect to wifi in home anymore even after a restore. Rhapsody no longer works on my phone either. Plus the brighth graphics are bothering my eyes even with brightness turned down. Any ideas on why rhapsody doesn't why rhapsody doesn't work anymore?

Contact Rhapsody to see if they have or plan to release an update for the app. Try uninstalling and reinstalling the app. Have you tried resetting your device by pressing and holding the Home button and power button until the silver apple appears?

My iMac suddenly no longer connects to wifi network when in KIOSK (username) mode, and only connects when as ADMINISTRATOR mode. Its strange because the iMac has been working fine in KIOSK mode for over a year until 2 days ago.

My iMac suddenly no longer connects to wifi network when in KIOSK (username) mode, and only connects when as ADMINISTRATOR mode. Its strange because the iMac has been working fine in KIOSK mode for over a year until 2 days ago.

One of the memory cards was indeed faulty, and the other completely fine
Thanks very much for all your help!
Although there is one little thing that I've noticed. The iMac works properly, but I tried to software update to see if that may help my Minecraft sound issue (as I still don't think only having 2GB instead of 4GB would cause such a problem) but the software update application won't work. Running the "Software Update" from the apple menu on the toolbar gains no response, nothing happens. If I run the software update from system preferences, the application icon appears for a second, then disappears (as in the blank app. icon, the blank canvas with the pencil, pen and ruler in the bottom right corner). It does this every time I try to run it. It did work when the computer was crashing, but this started when on one of the occasions I ran the app. while it was crashing. Since this occured during the crashes, and still occurs now, I'm wondering did something simlar happen minecraft, as it's sound disappeared during the crashes and is still gone now.
However, the computer is now working again without crashes, which is the main thing, thanks for helping me fix the issue
Edit: I would mark the topic as solved, but I'm unsure if this would lock the topic or something simlar, so I'd rather leave it open for any ideas regarding the software update and Minecraft issues I'm having

Can't connect to wifi in hotels in Ireland with iPhone 5

Can't connect to wifi in hotels in Ireland with my iPhone 5. My iPad 3 works fine. When I enter the wifi password for the network I always get the error message "Incorrect password for XYZ". No problem with iPad 3.

Returned home only to find the same situation with my home network. Much time on chat support with Apple. Short story long: Must have been corrupted software. Had to restore original original software then add back apps and music. Couldn't back up before doing the restore so I lost a bunch of pics, but at least the phone is working once again.

I just bootcamp my macbook white to windows 7 home premium and I can't connect to wifi now! Plz help

I used to run windows xp on my macbook with no problem.
I just bootcamp to windows 7 and can't connect to wifi! T_T plz help...
I can't see the wifi bar at the noti panel just the monitor with a red cross.
Need help....

Hee hee thank you for the reply! Just install the boot camp setup drivers... haha its working now thank you!

Suddenly can't connect to windows server

I suddenly can't connect to the windows server. The username and password is correct, but it says "Connection Failed: Unknown user, incorrect password, or login is disabled. Please retype the name and password or contact the server's administrator." It pings the server as well. My internet and email works fine. The IT guys can't figure it out either, but they are not mac gurus. Connecting via smb comes back with "Could not connect to the server because the name or password is not correct" before I even enter login information, if that is helpful information. I also tried connecting through the server alias under the network and its the connetion failed as going through Connnect to Server and entering it as AFP://ipaddress.
Can it be from the 10.4.11 update? It was fine before the update I believe - but I can't recall for sure. I'm a lone mac user in a very pc company, so any mac expert advice would be helpful.
Is just strange since I have no problems connecting to our work email via GroupWise.

Connecting via smb comes back with "Could not connect to the server because the name or password is not correct" before I even enter login information, if that is helpful information.
Yes for any previous connection, Macs will send what's in Keychain Access, even if it's wrong, before you get asked... delete that reference in Keychain Access.

Suddenly can't connect to wifi

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