IMac wifi assigns it's own ip address and won't connect

I just install Lion hardwired through my ethernet port, but when I try to use the WiFi connection it assigns it's own IP address and won't connect. I did the exact same process with my other iMac and had no issues.
Any idea what can be causing this problem?

Okay, problem resolved. I rebooted my entire ATT Uverse system and the computer instantly picked up the connection.

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MacBook Airport card has lost its IP address and won't connect to my network

The Airport card on my MacBook has lost its IP address and will not connect to my network. It worked fine until about two or three days ago. Network Diagnostics says that the Airport now has a self-assigned IP number and will not connect to the Internet. I can't find any info anywhere that tells me how to restore the IP number, and I don't get how it can have a self-assigned number and not connect. I have AT&T U-Verse, and my iMac desktop and two iPhone 4s connect with little difficulty. The MacBook is three years old, and AppleCare just expired two months ago. I'm still running 10.6.8 on both machines. I found an article saying that sometimes DHCP leases expire, but my desktop still works ifne, and I've had both connected to the same network since the same time. The artcicle said that more than one machine can share an IP address, so I wanted to try to enter the desktop IP address into the laptop, but I can't find a way to do so, either. Any thoughts?

Have you tried making a New Location for each yet? The Automatic one get confused easily.
Some "nix" to try when it happens also...
sudo ipconfig set en1 BOOTP;sudo ipconfig set en1 DHCP
sudo ifconfig en1 down;sudo ifconfig en1 up
Sometimes having an all OFF Location can help, thanks to Gnarlodious...
http://gnarlodious.com/Computer/MacOsx/WiFi

Wi-Fi self-assigned IP address and won't connect to internet?

Hi guys,
Hoping someone can figure this one out for us as we're all starting to suffer from Wi-Fi withdrawal symptoms!!!!
We are using iMac OS X 10.7.5. We have an ethernet connection coming directly into the iMac from the vessel's server (working on a cable laying ship) and can still gain access to the internet on the desktop itself.
Up until this afternoon everything was working as per usual (iPhones sharing internet through network created on iMac, this needed reset roughly every 15-30 minutes in order for it to allow devices to access internet). But then all of a sudden nothing can connect to the Wi-Fi network. There are very short periods (5-10 seconds every 20-30 mins) where connections are made then drops out again. Have tried several different methods (renew DHCP Lease, create new location, etc) but nothing seems to work.
Then I noticed that our Wi-Fi had a Self-Assigned IP address (attached a screenshot below):
If anyone has any suggestions or ideas on how to remedy this problem it would be much appreciated, cheers .

Can your MacBook connect to any other Wi-Fi network or just not the one provided by your AirPort base station?
Was it able to connect before or has it never been able to connect to your network?

My ipad recognizes my home network but will not connect to the internet. When I click on AirPort/preferences at the top of the imac screen it says..."AirPort has a self-assigned ip address and may not connect to the internet".How can I change ip address?

My ipad recognizes my home network but will not connect to the internet. When I click on AirPort/preferences at the top of the imac screen it says..."AirPort has a self-assigned ip address and may not connect to the internet". If this is the root of the problem,how can I change ip address?
Ipad will connect no problem to other networks.

First thing you need I think is to get your iMac connected to the Internet.
Shut down your iMac and you iPad. Then power off your router. Wait 30 seconds and power up the router.
After the router indicates that it is connected to the Internet then start up your iMac and see if it connects. If the iMac connects to the Internet then your iPad should too.
If this power up sequence doesn't work you'll have to dig into the router setup to make sure it is working properly.

My wife and I share an Ipad.   We each have our own email address and calendar.   What is the best way for us to backup both accounts (we currently only have 1 ICloud account)?   Thanks for any help!    Alan

My wife and I each have our own email address and calendar. These are on one IPad.   The Ipad has a single ICloud account.
What's the best way to backup both Calendars, etc?   Does ICloud automatically back up every account on the same IPad? (I checked ICloud, but I could only find my stuff.)
Thanks for any help!
Alan

First, you need to understand that there's a difference between "syncing" and "backup". Backup is the saving of content and settings, where syncing is the bidirectional transfer of content for an account to a web-based server (like iCloud, Gmail, Yahoo, etc.)
If you see your calendar in your iCloud account, that implies that you have set up your iCloud account to host (sync) your calendar, and perhaps contacts, email, and notes. An iCloud account can only sync one user's information at a time so it is intended to support a single user. You can have more than one iCloud account, and you can even have more than one iCloud account on the same device (but one has to be primary, and the secondary iCloud has limited capabilities), but a single iCloud account only supports a single user's content.
Backup is the saving of your device's content and settings to use in case you need to recover these things, but you can't see the contents of your backup (just the size and device name). You can backup more than one device to iCloud and you can backup to iCloud or you can backup to your computer, or both (one at a time though, you have to choose).
So, if your wife has her own email and calendar she can certainly do that in parallel to whatever account(s) you have for email and calendar. But if you have only one iCloud account then only one of you can use it for email, calendar, etc. But the backup of these accounts is really just a backup of the device's settings that link the device to these accounts. For example, if she uses Gmail then the backup of the iPad only backs up the fact that your iPad is set up to use her account, it does not backup the account itself (the content of her account is saved and preserved on Google's servers, not your device's backup).
Does that make better sense?

I'm using 4th gen IPOD touch and the wifi can't connect to my home NTWK, it sends me to a far distant IP ADDRESS and can't connect. a building public NTWK is wifi connectable

http:/I'm using 4th gen IPOD touch and the wifi can't connect to my home NTWK, it sends me to a far distant IP ADDRESS and can't connect. a building public NTWK is wifi connectable, any ideas how I can resolve this WIFI issue??? TY
[email protected]

Do other devices connect to your router?
What do you mean by distant IP address?
- Reset the iPod:
Reset iPod touch: Press and hold the On/Off Sleep/Wake 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 yur router
- Reset Network settings: Settings>General>Reset Reset Network Settings
- The troubleshooting here:
iPhone and iPod touch: Troubleshooting Wi-Fi networks and connections

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My mac air OSX10.8.5 won't connect to the internet. It says it has a 'self assigned IP address and therefore cannot connect to the internet'. Network diagnostics is unable to the solve the problem. It happened suddenly for no reason and now I cannot connect except by typing in the configuration settings manually. Please help me!

Use the Airport Utility or log into your wireless device via http and ensure the DHCP/NAT service is enabled. If accessing via HTTP, you will need to manually set an ip within your local subnet (eg: 192.168.0.x).

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Please help

Open System Preferences/Network
Select the Location you use at home
You may need to click the Padlock bottom left at this point if it's locked, enter the admin password to unlock
In the left hand column drag the Ethernet connection to the top of the list and remove any you don't use
Click the Advanced button bottom right
Click the TCP/IP Tab
Set Configure IPv4 to Using DHCP
Click OK bottom right and you should see the Router IP number appear and a unique but similar one for your Mac
Click Ok then click Apply and close the Panel

My airport says self-assigned ip and won't connect to the wireless internet.

My airport says self-assigned ip and won't connect to the internet. It's set on Using DHCP, and nothing has changed router/internet wise. I tried it with the firewall off as well, but it still doesn't work. The ethernet works, and I tried setting the ip address manually to the same one as the router. It said it connected, but when I tried to load pages, etc. safari said I was not connected to the internet.
I also tried doing system updates and updating the airport utility - still nothing.

Psychoserenity wrote:
I also tried doing system updates and updating the airport utility - still nothing.
Repair permissions and restart your computer. Now try the following........
See KB Articles: http://support.apple.com/kb/HT1401 AirPort troubleshooting guide
http://support.apple.com/kb/HT2712 Using network locations in Mac OS X
============================
System Preferences>Network
Click the Assist Me button.
In the next window that pops up, click the Diagnostic button & do the necessary.
Also, run the Airport Utility app which is located inside the Utilities folder.

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What id shows in Settings > iTunes & App Store ? If it's the old one then tap on it and log out of it and then log in with the updated version

I have an iPhone 4S and for some reason when I go to turn my wifi on sometimes it's greys out and Won't let me turn it on so what can I do to fix this ???

I have an iPhone 4S and for some reason when I go to turn my wifi on sometimes it's greys out and Won't let me turn it on so what can I do to fix this ???

If the steps in the article TJBUSMC1973 linked didn't resolve your issue, then the next step would be to have your phone serviced at an Apple store. Good luck

My MacBook Pro shut down unexpectedly and won't connect to wifi now.

My MacBook Pro shut down unexpectedly and won't connect to wifi now. All other devices in my house are connecting to the wifi just fine. The laptop just refuses to connect. Any ideas on how to fix this/what it might mean?

Try a SMC reset:
http://support.apple.com/kb/HT3964
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Check the mage safe connector and port for any debris.

My wifi has an x and won't connect

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If it don't take your password, you will need to restore your device using the computer with which you last synced it. This allows you to reset your passcode and resync the data from the device (or restore from a backup).
If you restore on a different computer that was never synced with the device, you will be able to unlock the device for use and remove the passcode, but your data will not be present.

FaceTime call to my iMac will only ring once then hang up and won't let me answer. How do I make it ring more times?

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This article is pretty long but it has a troubleshooting guide near the bottom, and especially mentions your problem with a few things to try.
http://www.ilounge.com/index.php/articles/comments/the-complete-guide-to-facetim e-set-up-use-and-troubleshooting-problems/

IMac AirPort assigns it's own IP

I recently learned I could use my iMac's built-in AirPort card as a wifi hub for my iPod Touch. I tried it and it worked fine. I was able to browse the Internet from my iPod thru the iMac, which is connected to a DSL modem and AT&T broadband. "This will be handy when I get my iPad next month," I thought, and turned AirPort off until I needed it again.
A few weeks later I receive my iPad, turn AirPort back on, and enable Internet sharing. But something changed--now I get a message saying that AirPort is using a self-assigned IP address and cannot access the Internet. All the options on the AirPort settings page are grayed out. What happened and how do I fix it?

Well, my AirPort seems to be working now. Thanks for all the help from readers on this forum....not. What finally worked was an article at http://www.tuaw.com/2007/03/26/how-to-using-your-mac-as-a-nat-router/ I manually entered the IP address he used (under the "Adding another Ethernet port" section, strangely), and voila, my Touch and iPad can now access the web thru my Mac. I have no idea why it worked, or if there will be any unpleasant side effects.
I don't consider this question "answered" because I don't know why it worked fine one day, and then two weeks later required hours of research and a lot of experimentation to get it running. For all I know, turning the Mac off tonight will put me back at square 1 tomorrow. Baby steps.

IMac wifi assigns it's own ip address and won't connect

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